In the early time of computer age,a computer had a very large size.It took a space of a few rooms.Minicomputer,which came later,was much smaller but it's size still as big as a refrigerator.Computer was small enough to fit on the top of a desk or a table in 1971.It was then called a "Desktop Computer",or in short a "Desktop".But don't call it a "Tabletop" please ! as this is not familiar in the computer business.
Desktop computer is designed to fit in an individual workspace,i.e.in the office or at home.As it was for individual use,thus also called a "Personal Computer" or a "PC".
Desktop can be connected and share resource such as printer via a Local Area Network or LAN.Desktop spare parts and extensions are normally standardized.This makes it cheaper in terms of production cost and enable it for customization and upgrading.
Desktop is powered from electricity and it's safe from heat problem,even being used for long hours.
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