To understand how computers process information, we must study computers as collections of that perform tasks such as instruction processing, information storage, computation, and data transfer.

functional units

Explanation:

When you want to understand how information is processed by the computer, it is important for the computer to be studied as a collection of functional units  that perform tasks such as processing of instruction, storing information, computation, and the transfer of data. In other words, computer processing is better understood when you don't view the computer as a unit, but a collection of units.

i think its controle not shift

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