Control-C else, typically returning control to the user. Ctrl-C was one of a handful of keyboard sequences chosen by the program designers at Xerox PARC to control text editing, with Ctrl-Z (Undo), Ctrl-X (Cut), Ctrl-V (Paste), and Ctrl-P (Print). The first four letters are all located together at the left end of the bottom row of the standard QWERTY keyboard, and P towards the upper right. The equivalent key combination on Macintosh computers is Command-C. Control-C as an abort command was popularized by TOPS-20 and TOPS-10 and adopted by other systems including Unix. It was also adopted by Digital Equipment operating
Dvorak Simplified Keyboard layouts for English such as Colemak, but also for other languages such as the German Neo and the French BÉPO. Over the decades, symbol keys were shifted around the keyboard resulting in variations of the Dvorak design. During 1982, the American National Standards Institute (ANSI) implemented a standard for the Dvorak layout known as ANSI X4.22-1983. This standard gave the Dvorak pattern official recognition as an alternative to the QWERTY keyboard. The pattern standardized by the ANSI differs from the original or "classic" pattern devised and promulgated by Dvorak. Indeed, the pattern promulgated publicly by Dvorak differed slightly from the