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It is a lock key, like Caps Lock and Scroll Lock. Its state affects the function of the numeric keypad commonly located to the right of the main keyboard and is commonly displayed by an LED built into the keyboard. The Num Lock key exists because earlier 84-key IBM PC keyboards did not have cursor control or arrows separate from the numeric ...
Similarly, typewriter repair people used to refer to "a loose nut behind the keyboard" or a "defective keyboard controller." The broadcast engineering or amateur radio version is referred to as a "short between the headphones". Another term used in public safety two-way radio (i.e. police, fire, ambulance, etc.) is a "defective PTT button ...
With Num Lock on, digit keys produce the corresponding digit. On Apple Macintosh computers, which lack a Num Lock key, the numeric keypad always produces only numbers; the Num Lock key is replaced by the Clear key. The arrangement of digits on numeric keypads with the 7-8-9 keys two rows above the 1-2-3 keys is derived from calculators and cash ...
122-key terminal emulation keyboard: Home/Rule key with arrow keys in a "plus" layout; 24 function keys; 10-key left cluster with terminal commands (Attn, Clear, Pause, ErEOF, etc.). Some models with this P/N exist with the lock light panel present - secondary legends are blue on the version with the LLP.
In addition to the row of number keys above the top alphabetic row, most desktop keyboards have a number pad or accounting pad, on the right hand side of the keyboard. While num lock is set, the numbers on these keys duplicate the number row; if not, they have alternative functions as engraved. In addition to numbers, this pad has command ...
A typical 105-key computer keyboard, consisting of sections with different types of keys. A computer keyboard consists of alphanumeric or character keys for typing, modifier keys for altering the functions of other keys, [1] navigation keys for moving the text cursor on the screen, function keys and system command keys—such as Esc and Break—for special actions, and often a numeric keypad ...
Some brands of keyboards have a function mode key (also called F mode or Office Lock), and may replace the scroll lock indicator with an office lock indicator. Office Lock, when enabled, will enable alternate functions of the function keys , meant for use with various word processing or email programs.
ToggleKeys (or Toggle Keys) is a feature of Microsoft Windows. It is an accessibility function which is designed for people who have vision impairment or cognitive disabilities . When ToggleKeys is turned on, the computer will provide sound cues when the locking keys ( ⇪ Caps Lock , Num Lock , or Scroll Lock ) are pressed.