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
Keyboard layout of that script. An InScript keyboard is inbuilt in most modern operating systems including Windows, Linux, and Mac OS. It is also available in some mobile phones. Khmer uses its own layout roughly matched to the equivalent of its QWERTY counterpart. For example, the letter ល is typed on the same space as the letter L on the English-based qwerty. Since most Khmer consonants have two forms, the shift key is used to switch between the first and second forms. The glyph below the letter ញ is used to type in subscripts when they occur in a cluster. Since spaces