71.   They can be ordered through catalogs, computer bulletin board systems and on-line services.

72.   They overloaded the computer system, and the whole thing just stopped.

73.   Things went better after the new computer system was installed.

74.   This computer system gives the user the capability of accessing huge amounts of data.

75.   This is a computer system that combines maximum flexibility with absolute accuracy.

76.   This process is trivial for a native speaker of a language, however for a computer system the solution is more difficult.

77.   To the uninitiated, most computer systems seem complex and difficult to understand.

78.   We have less than two months to train people and change our computer systems over the Easter period.