NCR PC4I, Руководство пользователя

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HISTORICAL DATA
Data Block
RELATIONSHIP BETWEEN HARDWARE, SOFTWARE, AND
DATA
A computer can operate only if the hardware and software work
together. Normally, the hardware needs to contain an operating
system and an application program to perform a task.
Data must be present for productive performance of a task. Data can
be a file of customers, inventory, budget information, checks written,
or joystick movements directing your spaceship to avoid hazards.
The critical concept is that data does not define part of your computer
system. However, the existence of data, and the need to process,
rearrange, summarize, store, and report data, justified and caused the
existence of the computer.
OWNER S MANUAL
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