Command History
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Command history is a common feature in command line interface, such as in operating system shells, computer algebra programs and other software that interact with the user through a command line. Command history involves making previously made commands, usually up to some number of the last ones, easy to once again input to the command line. Often this is done by allowing the user to go through the list of past commands by clicking the Up key on the keyboard.
Command history takes advantage of the fact the user may want to execute the same command many times, such as a developer frequently compiling and running a program, or else the new command may be a small modification of a previous one, hence necessitating little typing to modify it. Hence it saves a lot of typing for the user and increases the speed and accuracy of input to the computer.
See also autocomplete, autoreplace, Intellisense for other user interface technologies that serve to speed up and simplify text input.