51.   It will also allow them to set up local area networks, which enable many computers to use the same connection at once.

52.   Lambright, in turn, lets children in her building without computers use hers.

53.   Macintosh computers use a color rendering system that is different from Windows machines.

54.   Most computers use separate chips to process sound and video, while the main processor does the rest.

55.   Most laptop computers have used a screen technology, called passive-matrix display, that provides somewhat slower and less vivid graphic images.

56.   Most users, however, will be transferring between computers using the same operating system.

57.   Not only is it balky, but it uses the parallel port many computers use for their printer.

58.   OS X is based on a variant of the high-powered Unix operating system, and Unix computers normally use mice with two or three buttons.

59.   Present computers use transistors which are operated by the passage of thousands of electrons.

60.   So you can ask the salesman if the computer you want uses one of those boards.