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vi (pronounced as distinct letters, / ˌ v iː ˈ aɪ / ⓘ) [1] is a screen-oriented text editor originally created for the Unix operating system. The portable subset of the behavior of vi and programs based on it, and the ex editor language supported within these programs, is described by (and thus standardized by) the Single Unix Specification and POSIX.
Arrow keys were included in later Apple keyboards. Early models with arrow keys but no middle section (Home, End, etc.) placed them in one line below the right-hand Shift key in an HJKL-like fashion; later versions had a standard inverted-T layout, either in the middle block or as half-height keys at the bottom right of the main keyboard.
Most keyboard shortcuts require the user to press a single key or a sequence of keys one after the other. Other keyboard shortcuts require pressing and holding several keys simultaneously (indicated in the tables below by the + sign). Keyboard shortcuts may depend on the keyboard layout.
Vim (/ v ɪ m / ⓘ; [5] vi improved) is a free and open-source, screen-based text editor program. It is an improved clone of Bill Joy 's vi . Vim's author, Bram Moolenaar , derived Vim from a port of the Stevie editor for Amiga [ 6 ] and released a version to the public in 1991.
Keyboard with 24 function keys. IBM 5250: early models frequently had a "cmd" modifier key, by which the numeric row keys emulate function keys; later models have either 12 function keys in groups of 4 (with shifted keys acting as F13–F24), or 24 in two rows. These keys, along with "Enter", "Help", and several others, generate "AID codes ...
This attitude shaped the interface of Emacs; [6] compare the use of the ⎋ Esc key in vi, due to the convenient position of the key on the ADM-3A terminal. [7] Other users, however, thought that so many keys were excessive and objected to this design on the grounds that such a keyboard can be difficult to operate. [5]
This page lists codes for keyboard characters, the computer code values for common characters, such as the Unicode or HTML entity codes (see below: Table of HTML values"). There are also key chord combinations, such as keying an en dash ('–') by holding ALT+0150 on the numeric keypad of MS Windows computers.
An escape character is usually assigned to the Esc key on a computer keyboard, and can be sent in other ways than as part of an escape sequence.For example, the Esc key may be used as an input character in editors such as vi, [13] or for backing up one level in a menu in some applications. [14]