In Addition to Microsoft Windows Operating Systems, What Four Operating

question 7

Essay

In addition to Microsoft Windows operating systems, what four operating systems are covered in a limited scope in the CompTIA A+ exams?

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Definitions:

Force

Push or pull effort measured in units of weight. Force represents the ability to do work but this ability does not necessarily result in any work done; for instance, you can push all you like on a tractor/trailer combination but it is unlikely to move the vehicle. The formula for force (F) is calculated by multiplying pressure (P) by the area (A) it acts on. F=P*A.

Perfect Vacuum

A theoretical state where a space is completely devoid of matter, including air or any other gases, achieving a total absence of pressure.

Sealed Vessel

A container designed to be completely airtight, preventing the exchange of substances with its environment.

Nitrogen

Nitrogen is a colorless, odorless, tasteless gas that makes up about 78% of the Earth's atmosphere, significantly used in fertilizer production, as a refrigerant, and as a replacement for air in tires to maintain stable pressure.