51.   My computer is slow because it needs more RAM.

52.   The computer is an aid to keeping costs down.

53.   My computer is super slow this morning.

54.   Handheld computers are novel devices.

55.   This old computer is a goner.

56.   That old computer will soon be a museum piece.

57.   Mainframe computers were very large indeed, often occupying whole air-conditioned rooms, employing full-time technicians and run on specially-written software.

58.   The computer will still be unable to predict whether Princeton, New Jersey, will have sun or rain on a day one month away.

59.   Nearly all present-day computers are sequential machines which perform only one operation at a time.

60.   A useful starting point is to go back twenty years to a time when computers were still huge, unfriendly devices demanding air-conditioned environments and costing millions.