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 layout the Admin was using. A number of mobile phones today are built with either full QWERTY keyboards or software implementations of them on a touch screen. Sometimes the keyboard pattern can be changed by means of a freeware third-party utility, such as Hacker's Keyboard for Android, AE Keyboard Mapper for Windows Mobile, or KeybLayout for Symbian OS. The RIM BlackBerry lines offer only QWERTY and its localized variants AZERTY and QWERTZ. Apple's iOS 8.0 and later has the option to install onscreen keyboards from the App Store, which includes several free and paid Dvorak layouts. iOS 4.0 and later