computers are not nearly as powerful as supercomputers, but are capable of great processing speeds and data storage and occupy specially wired, air-conditioned rooms..

The correct answer is "Mainframe computer".  

Explanation:

The main objective of Mainframe computers it is used for critical applications by big organizations for the huge data processing like as corporate resource planning, and payment processing.

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solution:

the auto-correct option of the auto-correct tool enables you to add and delete words that do not follow abbreviation rules because:

it is a feature that allows outlook to correct common spelling and typing errors and to replace characters with symbols. we can also can use auto-correct as a shortcut, which means we can type a small string of characters and have those characters replaced by a longer string.