51.   Each has offered a competing vision for integrating diverse proprietary systems, ranging from corporate mainframe computers to wireless hand-held appliances.

52.   Each student was quizzed daily to find out what he or she had learned, and that information was put onto punch cards and fed into a mainframe computer.

53.   EMC, of Hopkinton, Mass., is a market leader in developing backup storage for mainframe computers.

54.   EMC Corp. unveiled two new products and outlined its strategy for expanding into new markets as growth slows in its primary business of making storage devices for mainframe computers.

55.   Even though the problem was born in the era of mainframe computers, the pox has spread to the desktop.

56.   Gartner also expects orders for mainframe computers and desktops to weaken, then rebound next year.

57.   Foreseeing the demise of the mainframe computer, the company tailored its databases to run on different sizes and brands of computers, all the way down to PCs.

58.   Gerstner is determined to make IBM a success not just in its bread-and-butter product line of mainframe computers, but in personal computers too, some analysts say.

59.   He wanted to build a workstation that would handle the complex operations that a mainframe computer could, but that was inexpensive and easy to assemble.

60.   His critics call it a look backward toward the era of the mainframe computer.