A computer is a machine (hardware) that receives and processes data according to the instructions given to it, and after the data has been processed, the results of the processing are usually sent to an output device.

The main components of a computer are 1) RAM 2) CPU and 3) Hard disk.

RAM

Random-access memory (RAM) is the place in a computer where the operating system, application programs, and data in current use are kept so that they can be quickly reached by the processor. The contents of RAM are lost when the computer power is turned off.

CPU

A CPU is on a chip called a microprocessor. The CPU handles most of the operations that are required of the computer by processing instructions and sending signals out, checking for connectivity, and ensuring that operations and hardware are functioning properly. It acts as a messenger to major components such as RAM, the monitor, and disk drives.

Hard Disk Drive

The hard drive is where all your programs and documents are stored. Anytime you install software or save a file, it gets written to the hard drive. The hard drive also reads any data you are trying to access, such as when you open a text document or play an MP3.

“And Your Database is no EXCEPTION. In your database RAM is called shared memory, CPU is called Background-processes, and Hard Disk is called Database files”