a printed circuit board containing the principal components of a computer or other device, with connectors into which other circuit boards can be slotted.
HARD DISC DRIVE
There are many ways to classify monitors. The most basic is in terms of color capabilities, which separates monitors into three classes:
CPU (pronounced as separate letters) is the abbreviation for central processing unit.
Sometimes referred to simply as the central processor, but more commonly called processor, the CPU is the brains of the computer where most calculations take place. In terms of computing power, the CPU is the most important element of a computer system
OPERATING SYESTEM/OTHER SOFTWARE