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
USS Letter B (SP-732) USS Letter B (SP-732) USS "Letter B" (SP-732) was a United States Navy patrol vessel in commission from 1917 to 1919. "Letter B" was built in 1912 as a private "runabout"-type motorboat of the same name by the Electric Launch Company (ELCO) at Bayonne, New Jersey. On 7 May 1917, the U.S. Navy acquired her under a free lease from her owner, C. Chester Eaton of Brockton, Massachusetts, for use as a section patrol vessel during World War I. Enrolled in the Naval Coast Defense Reserve on 10 May 1917, she was commissioned as USS "Letter B" (SP-732) on 20