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 on the leftmost three keys of the upper row, which correspond to punctuation symbols on the English Dvorak layout. This retains the original English DVORAK design goal of keeping all vowels by the left hand, including Y which is a vowel in Swedish. The displaced punctuation symbols (period and comma) end up at the edges of the keyboard, but every other symbol is in the same place as in the standard Swedish QWERTY layout, facilitating easier re-learning. The Alt-Gr key is required to access some of the punctation symbols. This major design goal also makes it possible to "convert" a