When was the world's first laptop computer introduced in the market and by whom?

A. Hewlett-Packard

B. Epson, 1981

C. Laplink traveling software In1982

D. Tandy model-2000, 1985

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  16. Which computer memory is used for storing programs and data currently being processed by the CPU?
  17. Which of the following file organization is most efficient for a file with a high degree of file activity?
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  19. A normal CD-ROM usually can store up to data?
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