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Caps Lock

Caps Lock is a toggle present on most computer keyboards, which, when activated, switches the input mode for alphabetic characters from lowercase to uppercase (or vice versa) without affecting numerals, punctuation, or other symbols. This function allows users to type in all capital letters continuously without holding the , improving efficiency for tasks requiring uppercase text. The key's design evolved from mechanical typewriters, where a shift lock physically latched the shift to uppercase characters, first appearing as an in the late to streamline typing. The contemporary electronic version of Caps Lock originated in a 1968 U.S. patent by engineer Douglas A. Kerr, which described a "capitals key" (CAP) that provided an alphabetic-only shift lock, inverting specific bits in the ASCII code for lowercase letters to generate uppercase equivalents while preserving access to non-alphabetic symbols. This addressed limitations of earlier shift locks that affected the entire , restricting numerals and punctuation. Caps Lock gained widespread adoption in personal computing through IBM's , released in 1984, which standardized its position and function on layouts. Despite its utility, the key has become notorious for accidental activations leading to unintended uppercase input, prompting many users to remap it to other functions like for enhanced productivity in programming and typing workflows. It also inspired International Caps Lock Day, semiannually observed on October 22 and June 28, an annual event started in 2000 by software developer Derek Arnold to humorously highlight frustrations with the key's placement and behavior.

Definition and Function

Basic Operation

The Caps Lock key functions as a toggle lock on computer keyboards, permanently capitalizing alphabetic characters in bicameral scripts such as Latin or Cyrillic while leaving numbers and symbols unchanged. When pressed once, it activates uppercase mode for all subsequent letter inputs; a second press deactivates it, reverting to lowercase. This behavior applies specifically to alphabetic keys, ensuring consistent case inversion without altering non-letter inputs. In contrast to the , which serves as a temporary modifier held down to produce uppercase letters only for the duration of the press, Caps Lock maintains its state persistently until toggled again, facilitating efficient entry of extended uppercase text such as headings or acronyms. This distinction optimizes typing workflows, as Shift requires ongoing manual activation for each character, whereas Caps Lock eliminates repeated key combinations for prolonged uppercase use. Operating systems implement Caps Lock through standardized input protocols. In Windows, it is recognized via virtual key code VK_CAPITAL (0x14). In macOS, the key is handled with code kVK_CapsLock (0x39) in the event system. In , the kernel assigns it keycode KEY_CAPSLOCK (58). Across these systems, the key is typically processed using 0x3A from PS/2 scan code set 1, after from the keyboard's native set 2 transmission. Many keyboards provide visual feedback through an LED indicator that illuminates when the uppercase state is active.

Indicators

Many keyboards feature a dedicated LED light that illuminates to indicate when Caps Lock is active, helping users avoid unintended uppercase typing. This LED is typically positioned on the Caps Lock keycap itself or in the keyboard's top-right section, near other status lights. Software-based on-screen indicators supplement hardware lights by displaying the Caps Lock status directly on the . In macOS, starting with Sonoma, a blue arrow icon appears adjacent to the text insertion point in editable fields to signal active Caps Lock, enhancing visibility during text entry. For users with visual impairments, accessibility tools provide auditory feedback on Caps Lock state changes. Screen readers like Apple's VoiceOver can be set to announce "Caps Lock on" or "Caps Lock off" upon toggling, accessible through VoiceOver Utility's Announcements preferences. Laptop keyboards often vary in indicator implementation due to space constraints in compact designs. Some models omit a dedicated Caps Lock LED entirely, relying instead on on-screen notifications, while others share a single LED with Num Lock to indicate multiple lock states. These indicators activate in response to the basic toggle function of the Caps Lock key.

Historical Development

Origins in Typewriters

The precursor to the modern Caps Lock key emerged from the Shift Lock mechanisms developed for 19th-century mechanical , which allowed sustained uppercase typing without continuous manual intervention. The Remington Standard No. 2, introduced in 1878 by , marked a pivotal advancement as the first commercially successful typewriter to incorporate a shift mechanism enabling both uppercase and lowercase characters on a single set of typebars, rather than requiring separate keys for each. This innovation, patented by the company, addressed the limitations of earlier models that used dual keyboards or cumbersome dual-strike methods for case variation. In early iterations of the Remington No. 2, dating to around , the system employed dedicated "Upper Case" and "Lower Case" keys rather than conventional shift keys, with uppercase serving as the default mode to align with prevalent business typing practices. The "Upper Case" key functioned as a lock, securing the mechanism in the uppercase position to produce all capital letters and corresponding uppercase symbols or numerals on the typebars, while the "Lower Case" key provided temporary access to lowercase only during its depression. This locking feature eliminated the fatigue of holding a shift for extended all-caps passages, common in formal documents like contracts or ledgers. The physical mechanism relied on a shifter—a pivoting on the machine's left side—linked by rods to the case keys, which adjusted the platen's position relative to the typebars. For uppercase locking, a or engaged to hold the platen backward, elevating the typebar basket to strike the uppercase elements; manual release via the opposite case key disengaged it. This design prioritized durability and simplicity for use, reducing repetitive motions and enhancing in an era when typewriters were primarily tools for commercial correspondence. Subsequent refinements built on these foundations through early patents for locking shift systems in the late 19th and early 20th centuries. For instance, U.S. 464,504, filed in 1889 and granted in 1891 to Wellington P. Kidder for the typewriter (introduced in 1891), described an explicit shift lock that secured the platen in the shifted position via a spring-loaded , influencing later models by standardizing the toggle-like operation for uppercase persistence across letters and symbols. These innovations underscored the typewriter's evolution toward ergonomic efficiency, setting the stage for broader adoption in professional settings.

Computer Era Introduction

The transition of the Caps Lock function into the computer era began with the development of electronic keyboards in the late 1960s, building on conceptual foundations from typewriter shift mechanisms. In 1968, Douglas A. Kerr, an engineer at Bell Labs, filed a patent for a shift arrangement in keyboard data senders that introduced a dedicated "CAP" key. This key was engineered to lock only alphabetic characters to uppercase output, unlike traditional full Shift Locks that affected numerals and symbols as well, thereby enabling more precise control in data entry for electronic terminals. The patent was granted in 1971, marking an early innovation tailored to the needs of digital input systems. The Caps Lock key achieved widespread adoption through IBM's computing hardware in the early 1980s. The PC, introduced in 1981, featured the with an 83-key layout that incorporated Caps Lock, assigning it 3A in the system's protocol for reliable detection and processing. This design carried over to the PC/XT in 1983, enhancing compatibility for business applications. The subsequent , released in 1984, refined the implementation with buckling-spring switches and integrated support, establishing a durable that influenced for computers. By the mid-1980s, Caps Lock had become a standardized element in major keyboard layouts, reflecting its essential role in computing interfaces. The (ANSI) formalized its position and function in INCITS 154-1988, which defined the arrangement for alphanumeric keyboards used in U.S. systems. Internationally, the (ISO) included it in the ISO/IEC 9995 series, first published in 1994, ensuring consistency across global PC deployments. Concurrently, early operating systems like supported Caps Lock through data area tracking at memory location 0040:0017 (bit 6), allowing software to monitor and respond to its state for accurate text rendering. This integration made the key ubiquitous in personal computing by the decade's end.

Abolition Proposals

In the mid-2000s, software developer Pieter Hintjens, CEO of iMatix, founded the Capsoff organization to campaign for the removal or repurposing of the Caps Lock key from keyboards. Launched in 2006, Capsoff argued that the key was an outdated feature inherited from typewriter designs, where it served to lock uppercase letters without affecting numbers or symbols—a necessity no longer relevant in digital interfaces that offer alternatives like bold text or font variations for emphasis. Proponents highlighted its proneness to accidental activation, which often leads to typing errors in case-sensitive contexts such as passwords or code, disrupting workflows and requiring corrections. Additionally, the key is underutilized compared to the Shift key, with most users relying on temporary holds for uppercase letters rather than toggling, rendering Caps Lock superfluous for everyday tasks while its large size invites misuse like unintended "shouting" in online communication. Advocates proposed remapping Caps Lock to more practical functions, such as for command shortcuts or for modal editors like Vim, to reclaim valuable keyboard real estate without hardware overhauls. Software solutions emerged to support these changes, including SharpKeys, a free Windows utility that allows users to reassign the key via registry edits, effectively disabling or redirecting it to Ctrl or other modifiers. In the mechanical keyboard community, hardware modifications became popular, such as the switch under the Caps Lock key or replacing it with a programmable one to repurpose the position for or , often documented in enthusiast guides for custom builds. Despite these efforts, counterarguments emphasize Caps Lock's ongoing utility, particularly in accessibility features like Windows ToggleKeys, which provide when the key is pressed to assist visually impaired users in tracking lock states. It also supports quick all-caps input for emphasis in writing or acronyms in technical fields, where holding Shift repeatedly would be inefficient. Adoption of abolition remains limited; while replaced the physical Caps Lock with a Search key on Chromebooks since 2010—activating uppercase via Alt + Search—no major original equipment manufacturers (OEMs) like , , or have removed it from standard keyboards as of 2025, preserving compatibility across diverse user needs.

Design and Placement

Standard Position

In the standard US ANSI QWERTY keyboard layout, the Caps Lock key is positioned in the upper-left quadrant, directly below the key and above the left , occupying row 2 (with the number row as row 0) and column A (the leftmost alphanumeric column). This placement aligns with the specifications outlined in INCITS 154-1988 (R1999), which defines the arrangement of alphanumeric keys for office machines. The key measures approximately 1.75 units in width, where 1 unit corresponds to the standard size of an alphanumeric key (roughly 19.05 mm), and features either a stepped profile that contours to adjacent keys or a for consistent surface alignment. This sizing supports efficient or pinkie actuation without excessive reach. Ergonomically, the location positions the key within comfortable reach of the left-hand pinkie finger when the hand rests on the home row ( for the left hand), minimizing strain during prolonged typing sessions—a principle retained from foundational . For visibility, the keycap is conventionally imprinted with the text "Caps" or a symbolic lock icon, such as a or downward arrow representing sustained shift, adhering to common labeling conventions in alphanumeric keyboards. Some modern implementations incorporate an LED directly beneath the to illuminate and indicate the lock state. While this describes the default in US layouts, non-standard configurations may alter the position slightly for regional adaptations.

Layout Variations

In international keyboard layouts such as the French , the Caps Lock key occupies the conventional position to the left of the A key and above the left , but traditionally functions as a Shift Lock that affects both letters and non-letter symbols, similar to mechanisms, though modern implementations increasingly adopt standard Caps Lock behavior limited to letters. In the layout, the key maintains this same physical placement left of the Q key, yet operates as a Shift Lock in certain configurations, capitalizing letters while also shifting symbols and numbers when active. These variations sometimes integrate Caps Lock functionality with broader shift behaviors, diverging from the letter-only toggle in the baseline design. On compact keyboards, such as 60% layouts commonly used in mini mechanical boards and space-constrained laptops, a dedicated Caps Lock key is often absent from the reduced key count or remapped to alternative functions like a layer toggle or to maximize efficiency in the alphanumeric cluster. In non-QWERTY arrangements like the simplified layout, the Caps Lock key retains its standard physical position below key and to the left of the rearranged letter row, adapting seamlessly to the alternative alphabetic mapping without altering its core placement. For ergonomic keyboards such as the series, the key is repositioned within the contoured left keywell in a vertical column to align with natural hand , integrated into the split, sculpted design rather than a flat linear row. Mobile and virtual keyboards typically forgo a fixed physical Caps Lock key, instead providing on-screen toggle functionality through double-tapping the Shift icon—often located at the bottom left of the —or via a dedicated uppercase mode button that appears dynamically, allowing flexible access without a persistent position.

Behavioral Characteristics

Toggle Mechanism

The Caps Lock key operates as a toggle through a signal initiated at the level. When pressed, the controller detects the keypress and transmits a make (0x3A in PS/2 scan code set 2, or HID usage ID 0x39 for USB keyboards) to the host system, followed by a break upon release. This signal prompts the operating system to invert its internal state flag for , without generating a repeated input on hold. At the software level, the operating system maintains a flag representing the Caps Lock state, which modifies the interpretation of subsequent keypresses for alphabetic characters—converting lowercase to uppercase and vice versa—while leaving non-alphabetic keys and modifier states (such as Shift) unaffected. In Windows, this flag can be queried using the with the VK_CAPITAL code, where the least significant bit indicates the toggle status (1 for on, 0 for off). The state influences character generation in functions like ToUnicode, ensuring case inversion applies post-modifier processing. Edge cases arise in input methods involving s or diacritics under handling. For instance, when a (e.g., for ) precedes a base letter, the Caps Lock state is evaluated during composition to apply uppercase to the resulting if the flag is set, though some legacy console modes in may fail to capitalize accented letters due to input layer mismatches. The state persists system-wide across applications, as it is managed at the OS input driver level rather than per-app, ensuring consistent behavior when switching focus. Cross-platform implementations differ in event processing. In , the kernel's input subsystem registers the key event as KEY_CAPSLOCK (code 58) via the evdev interface, toggling the state in the keyboard handler for virtual terminals or X11/ compositors. macOS processes Caps Lock through the HID framework, using IOHIDManager to capture events with usage 0x39, maintaining the toggle in the Core Graphics input stack for consistent application of the state across and Carbon APIs.

Shift Interaction

When Caps Lock is activated, it toggles alphabetic keys to produce uppercase letters by default, but the simultaneous use of the inverts this effect, resulting in lowercase output for letters. This interaction functions as a form of : Caps Lock shifts letters to uppercase, while Shift, as a modifier, reverses that shift back to lowercase. For non-alphabetic characters, however, Caps Lock has no effect, so pressing Shift produces the expected shifted symbol or number variant, such as Shift+1 yielding an (!). This selective behavior ensures that punctuation and numerals remain accessible without interference from the toggle state. The priority rules in this interaction emphasize Shift's dominance for non-letter keys, overriding any potential Caps Lock influence since the latter only applies to alphabets. In practice, this means users can seamlessly access symbols (e.g., Shift+7 for &) even with Caps Lock engaged, without needing to disengage the toggle first. This design prevents conflicts in mixed input scenarios, like typing sentences with occasional . Historically, this limited scope marks a significant from the typewriter era's Shift Lock mechanism, which locked the entire shift function across all keys, converting numbers to symbols and letters to uppercase simultaneously. Early typewriters required manual disengagement via a press to return to baseline, often leading to mechanical jams or errors in symbol output. Modern computer implementations of Caps Lock, introduced in the , deliberately ignored non-alphabets to simplify digital input and align with software keyboards' logical mapping, reducing the risk of unintended shifts in numeric or symbolic data. Operating system-specific quirks further nuance this interaction. On Windows, the inversion for letters is consistent across applications, with Shift reliably producing lowercase when Caps Lock is on, adhering to standard keyboard input processing. In contrast, macOS prioritizes Shift's capitalization intent, so Shift + letter with Caps Lock active still outputs uppercase, treating Shift as an absolute override rather than a relative inverter; non-letters follow standard Shift behavior regardless. This macOS approach can lead to all-uppercase output in mixed-mode typing unless Caps Lock is explicitly toggled off, differing from Windows' more relative handling that may vary slightly by application but generally follows the inversion rule.

Issues and Precautions

Accidental Activation

Accidental activation of the Caps Lock key frequently stems from its standard placement adjacent to the 'A' key on keyboards, where the left pinkie finger—commonly used for pressing 'A' in —can easily overshoot and engage the toggle instead. This positioning, inherited from designs, increases the likelihood of mis-hits during rapid typing. Additionally, keyboards, which rely on pressure-sensitive membranes under the keys, can contribute to unintended activation due to their lower actuation force compared to mechanical switches, allowing light or grazing touches to trigger the key. The consequences of such activation include unintended all-caps output that disrupts typing flow, often requiring users to stop, notice the error, and to retype affected text, which is particularly disruptive in time-sensitive tasks like composing emails or writing . In emails, accidental all-caps can convey unintended , such as shouting, potentially leading to miscommunication or professional mishaps; for instance, all-caps phrasing in legal or has resulted in sanctions or dismissals, as documented in cases where perceived aggressive messaging escalated conflicts. In coding, it can introduce errors in string literals, comments, or configuration files, complicating and . Compounding these issues is the lack of indicators on many devices, such as compact laptops or wireless keyboards without dedicated LEDs, which prevents immediate feedback on the key's state and allows the error to persist unnoticed. This absence forces users to rely on visual inspection of their output, further delaying correction and heightening frustration, especially for touch typists who do not glance at the keyboard. Manufacturers have partially mitigated this through software-based on-screen notifications in operating systems like Windows and macOS, but limitations remain common. Informal user reports highlight high frustration levels among touch typists, with accidental activation cited as a recurring that interrupts productivity; for example, discussions on technical forums reveal widespread complaints about the frequency of such incidents during extended typing sessions.

SGCAPS and

SGCAPS, or "Shift-Gets-Caps-Lock," is a specialized feature available in the Keyboard Layout Creator (MSKLC), a tool for designing custom mappings. In this mode, activation of the Caps Lock key applies an implicit Shift modifier to designated keys, producing uppercase output without inverting the case of alphabetic characters as in standard Caps Lock behavior; instead, it mimics the effect of holding Shift for uppercase entry while preserving normal lowercase input when Caps Lock is off. This configuration, originally developed for layouts like , allows for more intuitive handling of case in certain linguistic or ergonomic contexts. Accessibility features in operating systems address challenges with Caps Lock, particularly for users with motor impairments who may struggle with precise key presses or toggling. In Windows, ToggleKeys provides auditory feedback—a high-pitched tone when Caps Lock is activated and a low-pitched tone when deactivated—to alert users to unintended state changes, helping those with limited dexterity confirm the key's status without visual reliance. On macOS, Slow Keys requires keys to be held for a configurable duration (adjustable from 0.0 to 1.0 seconds) before registration, which minimizes accidental activations of Caps Lock by filtering out brief, unintended presses common in conditions like tremors or reduced fine . These integrations, motivated by frequent reports of accidental Caps Lock engagement, enhance usability for individuals with physical disabilities. Remapping Caps Lock is a common accessibility adaptation for motor impairments, converting the key to a more reachable modifier like or to avoid accidental toggles while supporting one-handed operation or reduced hand mobility. On macOS, this can be done via > Keyboard > Keyboard Shortcuts > Modifier Keys. For Windows, provides an official tool with Keyboard Manager to remap keys like Caps Lock without third-party software or registry edits. These options prioritize ease for users with conditions such as or . In remote desktop environments, Caps Lock synchronization issues can exacerbate accessibility barriers, as state changes triggered on the server (e.g., via or RDP) often fail to propagate to the client, leading to mismatched input and frustration for users relying on consistent keyboard feedback. This desynchronization, documented in troubleshooting resources, particularly affects those with motor limitations who depend on predictable toggle behavior across sessions. Third-party tools like CapsUnlock provide additional safeguards by overriding the standard toggle mechanism, requiring intentional actions (such as a double-press or hold) to activate , thereby reducing errors for users prone to inadvertent key hits. For severe motor impairments precluding physical key use, voice control alternatives—such as or —enable dictation of uppercase text via spoken commands (e.g., "capital A") without engaging Caps Lock at all, offering a hands-free pathway to case control.

Cultural Aspects

International Caps Lock Day

International Caps Lock Day is an annual parody holiday observed primarily on , founded in 2000 by software developer Derek Arnold on the community weblog to highlight the overuse of all-caps typing and remind users to deactivate the Caps Lock key. Arnold, based in , created the observance as a lighthearted response to the common issue of "shouting" in uppercase letters, which the Caps Lock key facilitates. The day's activities typically involve ironic online participation, such as posting messages in all capital letters on platforms to mimic shouting while simultaneously encouraging participants to turn off their Caps Lock afterward. A secondary observance occurs on June 28, added later in honor of pitchman , known for his enthusiastic all-caps-style delivery, making the holiday semiannual in some calendars. The event has gained global recognition through coverage on technology and news websites, including features on its humorous take on keyboard habits by The Daily Dot in 2012 and LatestLY in 2024, which shared memes and jokes to amplify its reach. Despite its informal nature, International Caps Lock Day effectively raises awareness about digital typing quirks and without organized formal events or official status.

Media and Symbolism

In digital communication, the Caps Lock key has become symbolically associated with shouting or heightened emphasis, particularly in online text where all capital letters are perceived as louder or more intense than mixed case. This convention originated in early , such as 1980s groups, where was explicitly used to denote yelling due to the limitations of text-only interfaces lacking bold or italics. Over time, this symbolism extended to email, , and messaging, where netiquette guides discourage its overuse to avoid appearing rude or aggressive, as it mimics vocal volume in speech. For instance, phrases like "STOP THAT!" are interpreted as exclamatory outbursts, reinforcing the key's role in conveying urgency or emotion without auditory cues. Linguistic research further elucidates this symbolism, showing that Caps Lock activation on platforms like often signals prosodic features such as emphatic rather than mere . A study analyzing over 100,000 tweets found that all-caps text increases perceived happiness and , aligning with heightened or volume in , while having minimal impact on or low-arousal emotions. Single-word , enabled by brief Caps Lock use, functions similarly to semantic in prosody, as seen in constructions like "I LOVE it" or "NOT true," enhancing textual nuance in discourse. This interpretive flexibility allows Caps Lock to transcend simple shouting, serving as a tool for irony, excitement, or in . Beyond online expression, the Caps Lock key inspires broader cultural and artistic symbolism, notably in critiques of . In Ruben Pater's 2021 book CAPS LOCK: How Capitalism Took Hold of , and How to Escape from It, the term metaphorically represents the "locking" of creative practices into exploitative economic structures, where design serves over . Pater uses visual examples from , interfaces, and to illustrate how capitalist systems constrain designers, much like the key toggles text into a rigid uppercase mode, urging alternatives through radical collectives that prioritize social impact. This symbolic framing positions Caps Lock as an emblem of systemic rigidity in , extending its digital legacy into discussions of and .

References

  1. [1]
    Key values for keyboard events - Web APIs - MDN Web Docs
    Apr 28, 2025 · The Caps Lock key. Toggles the capital character lock on and off for subsequent input. The Control , Ctrl , or Ctl key. Allows typing control ...
  2. [2]
    US3569991A - Shift arrangement for keyboard data sender
    United States Patent Inventor Appl. No. Filed Patented Assignee SHIFT ARRANGEMENT FOR KEYBOARD DATA Douglas A. Kerr Middletown, NJ. 714,672. Mar. 20, 1968 ...Missing: CAP | Show results with:CAP
  3. [3]
    The History of Caps Lock: Why Does the Caps Lock Key Exist?
    Aug 8, 2020 · The original invention of Caps Lock seems to be linked to this 1968 Patent, which applies to an electronic terminal keyboard invented by Douglas A. Kerr of ...
  4. [4]
    4 Times Caps Lock Got Someone Into Trouble - Mental Floss
    Oct 22, 2018 · The caps lock key, as we know it today, debuted in 1984 with the release of IBM's Model M keyboard. Prior to that, there had been a lock key ...
  5. [5]
    International Caps Lock Day (October 22nd) | Days Of The Year
    Oct 22, 2025 · On mechanical typewriters, the Caps Lock key was first the Shift lock key. One of the earlier innovations in the use of typewriters saw a second ...<|control11|><|separator|>
  6. [6]
    [PDF] Universal Serial Bus HID Usage Tables - USB-IF
    Oct 28, 2004 · Keyboard Volume Down. √. 130. 82. Keyboard Locking Caps Lock12. √. 131. 83. Keyboard Locking Num Lock12. √. 132. 84. Keyboard Locking Scroll ...
  7. [7]
    Keyboard Input Overview - Win32 apps - Microsoft Learn
    Jul 14, 2025 · Toggle keys usually include Caps Lock (VK_CAPITAL), Num Lock (VK_NUMLOCK), and Scroll Lock (VK_SCROLL) keys. Most keyboards have corresponding ...
  8. [8]
    Virtual-Key Codes (Winuser.h) - Win32 apps | Microsoft Learn
    Oct 16, 2025 · The following table shows the symbolic constant names, hexadecimal values, and mouse or keyboard equivalents for the virtual-key codes used ...Keyboard and Mouse Input · Keyboard Input · Mouse Input · Raw Input
  9. [9]
    [PDF] USB HID to PS/2 Scan Code Translation Table
    System Power. 01. 81. E0 5E. E0 DE. E0 37. E0 F0 37. System Sleep. 01. 82. E0 5F. E0 DF. E0 3F. E0 F0 3F. System Wake. 01. 83. E0 63. E0 E3. E0 5E. E0 F0 5E.
  10. [10]
    Caps Lock Indicator Light not Working - Microsoft Q&A
    Dec 23, 2021 · Here's the steps you can try. -Press Windows key + X -Go to Settings -Click Update and Security -Click Troubleshooter then Additional troubleshooter.
  11. [11]
    Caps Lock On-Screen Display - Microsoft Q&A
    Aug 2, 2021 · Under "Indicator settings for NumLock and CapsLock" section, look for "While the numeric lock or caps lock is ON" section, choose the "Show the ...How to get Caps lock indication on system tray? - Microsoft LearnWindow 10 - Caps Lock + Num Lock Key Desktop Notification IndicatorMore results from learn.microsoft.com
  12. [12]
    How To Turn Off Blue Caps Indicator On-sc… - Apple Community
    Oct 9, 2023 · In MacOS Sonoma there has started to appear a blue caps indicator when typing and moving the cursor if caps lock is on. This is very annoying.Caps Lock Notification Icon - Apple CommunitiesHow can I restore the Caps Lock Indicator… - Apple CommunitiesMore results from discussions.apple.com
  13. [13]
    Use VoiceOver to hear what you type on Mac - Apple Support
    To set options to have VoiceOver tell you when you press the Caps Lock key or a modifier key, open VoiceOver Utility, then click Announcements. If you're ...
  14. [14]
    Using JAWS to Evaluate Web Accessibility - WebAIM
    Sep 28, 2020 · Under JAWS Key for Desktop Layout, select "Caps Lock". To toggle Caps Lock functionality while JAWS is running, press Caps Lock twice.
  15. [15]
    MS Sculpt Keyboard - no caps lock indicator light? Wha?
    Mar 24, 2022 · The MS Sculpt keyboard, for some unfathomable reason, does not HAVE an LED indicator to show the Capslock state at all. ... Caps Lock Indicator ( ...
  16. [16]
    SOLVED: Caps Lock LED Indicator? - Logitech K750 Keyboard - iFixit
    Apr 12, 2018 · Pressing the caps lock key could make a led blink twice for “On”, Once for “Off”, a second press within 2 seconds would CHANGE the status. A ...
  17. [17]
    The SHIFT key is special, and here's the weird history behind it
    Oct 29, 2025 · On typewriters, Shift Lock was often a separate key or lever. Press it once, and it would physically keep the carriage shifted (or the typebars ...
  18. [18]
    Remington 2 Standard Typewriter
    Introduced in 1878, the Remington 2 was the first typewriter to feature a shift key, enabling both uppercase and lowercase characters.
  19. [19]
    Case keys on early models of the Remington Standard No. 2
    Nov 19, 2013 · Early versions of the Remington Standard No. 2 feature “Upper Case” and “Lower Case” keys, instead of the more traditional “Shift” and “Shift Lock” functions.
  20. [20]
    Franklin
    This handsome machine was invented by Wellington P. Kidder and patented in 1891.
  21. [21]
    Franklin 1 Typewriter
    The Franklin was the first typewriter to have a shift lock function. The Franklin was well built, good to type on, well priced, and attractive.
  22. [22]
    [PDF] IBM PC Technical Reference - Bitsavers.org
    ... lock loop. The + 12 V dc and -12 V dc are used for powering the serial ... CAPS. -1. -1. LOCK. 59. NUL (Note 1). NUL (Note 1). 60. NUL (Note 1). NUL (Note 1). 61.
  23. [23]
    PC Keyboard: The First Five Years | OS/2 Museum
    Sep 3, 2019 · Original 83-key PC keyboard, 1981. From today's perspective, that ... Caps Lock moved under the Tab key, and Ctrl and Alt keys now both ...
  24. [24]
    Standardization of Keyboard Layouts - The ANSI Blog
    Having a standardized layout for keyboards is essential for maintaining interoperability among different types of computers and typing inputs.Missing: Caps | Show results with:Caps
  25. [25]
    ISO/IEC FDIS 9995-1 - Information technology — Keyboard layouts ...
    ISO/IEC 9995 defines a framework for the layout of all alphanumeric and numeric keyboards across the widest spectrum of today's and upcoming applications ...<|control11|><|separator|>
  26. [26]
    Death to Caps Lock - WIRED
    Aug 16, 2006 · Hintjens, the CEO of iMatix, has launched the Capsoff organization in a campaign urging hardware manufacturers to ditch the oft-abused and ...
  27. [27]
    It's time for Caps Lock to die - Medium
    May 24, 2019 · Doug Kerr invented the “CAP” key. CAP performed the same function as Shift Lock, except it only affected the letter keys. “CAP” became Caps Lock ...
  28. [28]
    Caps Lock to Control: Hardware Level Mechanical Keyboard Mod
    Cut or remove the warranty sticker with the "OK" on it and unscrew the one screw. Then slide a soft thin stick along the seam to unhook the short clips ...
  29. [29]
    How to set a computer to beep when Caps Lock or Num Lock key is ...
    Start Control Panel, and then click Accessibility Options. On the Keyboard tab, click to select the Use ToggleKeys check box.
  30. [30]
    Google's ChromeOS kills Caps Lock for Search | Fortune
    Hintjens, the CEO of iMatix, has launched the Capsoff organization in a campaign urging hardware manufacturers to ditch the oft-abused and misused key. Hintjens ...
  31. [31]
    Caps Lock 2025: Should the Key Stay or Be Repurposed?
    Oct 5, 2025 · Accessibility and the counterargument​. Caps Lock is not entirely useless. Some accessibility and assistive technology workflows still rely on ...
  32. [32]
    https://ux.stackexchange.com/questions/41864/why-is-the-caps-lock-key-often-so-big-on-a-keyboard
  33. [33]
    https://ux.stackexchange.com/questions/64585/why-does-the-caps-lock-key-have-a-down-arrow-as-its-icon
  34. [34]
    https://learn.microsoft.com/en-us/answers/questions/3822864/caps-lock-on-screen-display
  35. [35]
    Why is the caps lock key often so big on a keyboard?
    Jul 6, 2013 · Hence, the Shift and Caps Lock keys were made bigger as many typists would use two fingers on them to make it easier to press. Share.
  36. [36]
    Why does the caps lock key have a down arrow as its icon?
    Sep 19, 2014 · There is a standard for depicting the function keys on a keyboard, part of ISO/IEC 9995. You'll see there are two possible symbols for Caps ...Why are the characters on the keyboard all capitalized?Why do keyboard keys have (most) letters in top left corner?More results from ux.stackexchange.com
  37. [37]
    ISO/IEC 9995-1:2009 - Information technology — Keyboard layouts ...
    In stock 2–5 day deliveryISO/IEC 9995-1:2009 specifies a key numbering system which applies to all types of numeric, alphanumeric and composite keyboards of information technology ...Missing: Caps Lock
  38. [38]
    French keyboard layout
    § Caps lock is replaced by Shift lock, thus affects non-letter keys as well. But there is an evolution going towards a Caps lock key instead of a Shift lock.
  39. [39]
    Caps Lock and behavior on Numbers Row in French Layout Keyboard
    Mar 24, 2024 · When Caps Lock is pressed once it should behave like Shift is locked. · Pressing Shift key with Caps Lock pressed should “pause” Caps Lock · When ...
  40. [40]
    German Keyboard Layout
    caps lock shift control alternate graphics insert delete screen/page up screen/page down home, Feststelltaste "hold key" Umschalttaste "switch over key"
  41. [41]
    German Keyboard: Caps Lock is Shift Lock · Issue #174 - GitHub
    Oct 23, 2021 · ... QWERTZ, Caps Lock still behaves like a traditional Shift lock, i.e., the keyboard behaves as if the Shift key is held down, causing the keyboard ...
  42. [42]
    French (Standard, AZERTY) - Keyboard Layout Info
    French (Standard, AZERTY) Layout ; Caps Lock ; Q · ϴ. q. θ ; S · ẞ. s. ß ; D · d. $ ; F · f. ¤.
  43. [43]
    http://kbdlayout.info/KBDDV/
  44. [44]
    https://kinesis-ergo.com/wp-content/uploads/Adv2-Users-Manual-2-16-18.pdf
  45. [45]
    United States-Dvorak - Keyboard Layout Info
    United States-Dvorak Layout ; Caps Lock ; A. a ; O · o ; E · e ; U · u.
  46. [46]
    None
    Summary of each segment:
  47. [47]
    Type with the onscreen keyboard on iPhone - Apple Support
    Turn on Caps Lock: Double-tap the Shift key . Quickly end a sentence with a period and a space: Double-tap the Space bar.
  48. [48]
    https://www.usb.org/sites/default/files/hut1_21.pdf
  49. [49]
    USB HID Keyboard scan codes - GitHub Gist
    #define KEY_VOLUMEDOWN 0x81 // Keyboard Volume Down. // 0x82 Keyboard Locking Caps Lock. // 0x83 Keyboard Locking Num Lock. // 0x84 Keyboard Locking Scroll Lock.<|separator|>
  50. [50]
    https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-tounicode
  51. [51]
    GetKeyState function (winuser.h) - Win32 apps | Microsoft Learn
    Aug 4, 2022 · A key, such as the CAPS LOCK key, is toggled if it is turned on. The key is off and untoggled if the low-order bit is 0. A toggle key's ...Missing: flag | Show results with:flag
  52. [52]
    ToUnicode function (winuser.h) - Win32 apps - Microsoft Learn
    Feb 1, 2023 · In this function, only the toggle bit of the CAPS LOCK key is relevant. The toggle state of the NUM LOCK and SCROLL LOCK keys is ignored.
  53. [53]
    Accented letters don't get capitalized by caps lock in unicode mode
    Apr 21, 2022 · That one fixes utf-8 output issues, while dead keys is the input part. ... The dead accent problem doesn't involve the caps lock at all ...
  54. [54]
    1. Introduction — The Linux Kernel documentation
    ### Summary: Linux Kernel Input Handling for Caps Lock
  55. [55]
    UIKeyboardHIDUsage.keyboardCapsLock - Apple Developer
    UIKeyboardHIDUsage.keyboardCapsLock. The raw usage code 57 (decimal)/39 (hexadecimal). iOS 13.4+iPadOS 13.4+Mac Catalyst ...
  56. [56]
    Computer keyboard providing an alert when typing in Caps Lock mode
    <Page Up> and <Page Down>: These keys (sometimes labeled “PgUp” and “PgDn”) are used in software programs primarily for one-dimensional scrolling, for example, ...<|control11|><|separator|>
  57. [57]
    Why does the Caps Lock not toggle upper and lower case for ...
    Sep 10, 2014 · The Caps lock key is a toggle key meaning it has two states, as denoted by an LED on modern keyboard. This is in contrast to nearly all other keyboard keys ...Missing: definition | Show results with:definition
  58. [58]
    Disable Caps Lock when holding Shift on Mac? - Super User
    Apr 15, 2019 · On macOS you would have to disable Caps Lock to return to lowercase. Shift does nothing (apart from switching numbers to symbols).
  59. [59]
    Can I type in inverse case, lIKE tHIS, with caps lock on? - Ask Different
    Jan 4, 2012 · I can either hold down Shift the entire time I'm typing, letting go of it briefly to type a lowercase letter, or press Caps Lock twice for each lowercase ...How to disable long press Caps Lock feature in Mac keyboard?Disable lag when using caps lock key to toggle input languageMore results from apple.stackexchange.com
  60. [60]
    New Apple Keyboards Prevent Accidental Caps Lock Activation
    Feb 15, 2019 · This is because Apple put a delay on the caps lock key. It's barely noticeable, but you need to hold down the key roughly a quarter of a second ...
  61. [61]
    Disabling the caps lock delay on the aluminum keyboard
    Jul 11, 2008 · Is there any way of turning off the accidental caps-lock press prevention on the new Apple keyboards?caps lock is too sensitive on keyboard - Apple CommunitiesSensitive caps lock key - Apple CommunitiesMore results from discussions.apple.comMissing: membrane sensitivity
  62. [62]
    https://www.easeus.com/computer-instruction/caps-lock-indicator-not-working.html
  63. [63]
    https://ux.stackexchange.com/questions/22479/are-there-any-studies-which-investigate-the-usage-of-caps-lock
  64. [64]
    How to show alerts visually for NumLock and CapsLock - ThinkPad
    This article shows you how to change the settings for the on-screen NumLock and CapsLock indicators.
  65. [65]
    https://stackoverflow.com/questions/21135908/tounicodeex-fills-buffer-with-zeroes-and-returns-1
  66. [66]
    Are there any studies which investigate the usage of Caps-Lock?
    Jun 14, 2012 · This isn't a study, but this article provides a lot of insight. Some examples of Caps Lock lovers the article mentions are those with disabilities.Missing: accidental frustration
  67. [67]
    MSKLC Suggestions - Miloush.net
    Sep 15, 2005 · A 3rd party tool, Keyboard Layout Manager 2000 Demo, http://www.klm32.com/Download.html can do exactly that. The only IME I know that uses Caps- ...
  68. [68]
    ToUnicodeEx fills buffer with zeroes and returns 1 - Stack Overflow
    Jan 15, 2014 · "Inuktitut - Latin" is special in terms that it uses SGCAPS feature: Some keyboards do not associate the CapsLock and Shift keys together for ...
  69. [69]
    TOGGLEKEYS (winuser.h) - Win32 apps | Microsoft Learn
    Apr 1, 2021 · When the ToggleKeys feature is on, the computer emits a high-pitched tone whenever the user turns on the CAPS LOCK, NUM LOCK, or SCROLL LOCK key.
  70. [70]
    If your Mac doesn't respond to key presses - Apple Support
    Make sure Slow Keys is turned off. If Slow Keys is on, you must press and hold a key longer than usual before it's recognized.
  71. [71]
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/remote/caps-lock-key-status-not-synced-to-client
  72. [72]
    Make your mouse, keyboard, and other input devices easier to use
    Make the keyboard easier to use · To go to the Accessibility settings on your computer, press the Windows logo key+U or select Start > Settings > Accessibility.
  73. [73]
    Caps Lock status change isn't synced to client - Windows Server
    Jan 15, 2025 · This article provides a solution to an issue where the Caps Lock key status change triggered by an application in a remote computer isn't synchronized back to ...
  74. [74]
    Keyboard out of sync on RDP - Windows - Spiceworks Community
    Sep 8, 2020 · User has an issue with caps lock over RDP. When caps lock is enabled on the local computer the remote computer changes intermittently between cAPs and ...
  75. [75]
    CapsUnlock - The CapsLock key disabler - BrainSystems
    About. CapsUnlock supersedes the locking mechanism of the CapsLock key and thus prevents the accidental turning on of CapsLock.
  76. [76]
    THE ORIGIN OF INTERNATIONAL CAPS LOCK DAY - The Daily Dot
    Oct 22, 2012 · Founder Derek Arnold told the Daily Dot that he coined the holiday to raise awareness of all-caps typing. “The era of smartphones and new ...
  77. [77]
    HAPPY INTERNATIONAL CAPS LOCK DAY!!!1! - NBC News
    Oct 22, 2010 · Arnold and friends announced the holiday via MetaFilter in 2003, posthumously inducting Billy Mays -- the beloved, volume-control challenged ...
  78. [78]
    INTERNATIONAL CAPS LOCK DAY - October 22, 2026
    It was 2000 when Derek Arnold, a software developer in Iowa, chose October 22 as the day when everyone should press the Caps Lock key and type only in upper ...Missing: 2003 | Show results with:2003
  79. [79]
    INTERNATIONAL CAPS LOCK DAY | June 28 and October 22
    Derek Arnold founded International Caps Lock Day on October 22, 2000, as a parody on "small-mindedness of certain Western individuals." This June 28 day ...Missing: MetaFilter | Show results with:MetaFilter<|control11|><|separator|>
  80. [80]
    International Caps Lock Day 2024 Funny Memes and Jokes - LatestLY
    Oct 22, 2024 · Happy International Caps Lock Day 2024! Yes, it is indeed a legit celebration, which, by the way, is observed twice a year: once on June 28 and ...
  81. [81]
    The Meaning of All Caps—in Texting and in Life - WIRED
    Jul 23, 2019 · WHEN YOU WRITE IN ALL CAPS IT SOUNDS LIKE YOU'RE SHOUTING. Using capital letters to indicate strong feeling may be the most famous example ...
  82. [82]
    What We Talk About WHEN WE TALK ABOUT CAPS LOCK
    Oct 22, 2012 · Because ALL CAPS, we all know, is aggressive. It is rude. Etiquette -- er, netiquette -- therefore strongly advises against its use. For example ...Missing: symbolism | Show results with:symbolism
  83. [83]
    How Capital Letters Became Internet Code for Yelling
    Apr 17, 2014 · Typing in all caps is Internet code for shouting, and it is rude. People have long used capital letters to set text apart and convey its importance.
  84. [84]
    https://doi.org/10.3765/plsa.v3i1.4350
  85. [85]
    (PDF) Orthography in social media: Pragmatic and prosodic ...
    This study examines the use of "caps lock" on Twitter, which has been claimed to function as an emotive strengthener.
  86. [86]
    Why typing in all-caps looks like you're yelling (A brief history) - CNN
    Jul 23, 2018 · The use of capitalization to grab attention, to convey importance or urgency, or emphasize a thought is a common stylistic usage in the internet age.Missing: symbolism culture
  87. [87]
    CAPS LOCK - Valiz
    CAPS LOCK uses clear language and striking visual examples to show how graphic design and capitalism are inextricably linked. The book contains many case ...Missing: symbolism | Show results with:symbolism
  88. [88]
    Book Review: "Caps Lock" (Capitalism and Graphic Design)
    Nov 17, 2024 · In Caps Lock, Ruben Pater provides a comprehensive and chronological history of the long and complicated entanglement between graphic design and ...