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
QWERTY replaced with and . On some systems, the Danish keyboard may allow typing Ö/ö and Ä/ä by holding the or key while striking and , respectively.) Though it is seldom used (most Dutch keyboards use US International layout), the Dutch layout uses QWERTY but has additions for the € sign, the diaresis (¨), and the braces ({ }) as well as different locations for other symbols. An older version contained a single-stroke key for the Dutch character IJ/ij, which is usually typed by the combination of and . In the 1990s, there was a version with the now-obsolete florin sign