What is computer?

A computer is a programmable electronic device that accepts data, performs mathematical and logical processes as directed quickly, and displays the outcomes. There are many distinct kinds of computers, including mainframes, desktop and laptop computers, tablets, and cellphones.

The Basic components of a computer Hardware:

1.CPU(central processing unit)

2.RAM(Random Access Memory)

3.ROM(Read Only Memory)

4.Mother board



1.Cental Processing Unit:

The part of a computer that obtains and executes instructions is called the central processing unit (CPU). A CAD system’s CPU can be thought of as its brain. It is made up of a control unit, a number of registers, and an arithmetic and logic unit (ALU). The term “processor” is frequently used to refer to the CPU.

2.Random Access Memory:

A computer’s short-term memory, or RAM (random access memory), is where the data that the processor is presently using is kept. RAM memory capacity is essential for system performance since your computer can access RAM memory data more faster than data on a hard drive, SSD, or other long-term storage device.

3.Read Only Memory:

A type of computer storage called read-only memory, or ROM, contains non-volatile, permanent data that typically may only be read from, not written to. The software that enables a computer to boot up or regenerate each time it is turned on is stored in the ROM.

4.Mother Board:

The primary printed circuit board in all-purpose computers and other expanding systems is called a motherboard. It provides connectors for additional peripherals and retains and enables communication between many of the critical electronic parts of a system, including the memory and central processing unit.


A computer monitor is an output device that displays information in pictorial or textual form. A discrete monitor comprises a visual display, support electronics, power supply, housing, electrical connectors, and external user controls.


A computer mouse is a tiny, movable object that you can use to operate a variety of things. Most mouse types have two buttons, while some may also have a wheel positioned in the middle of the buttons. The majority of mouse models utilise the computer’s power and a cable connection to connect to it. Wireless mouse come in a few varieties.

versions of a computer:

On the basis of data handling capabilities. Three types of versions are there. they are

1.Analog computers.

2.Digital computers

3.Hybrid computers

1.Analog computers:


A computer that uses continually changing components, such as mechanical, electrical, hydraulic, etc. is known as an analogue computer. They originally saw use in the 1950s and 1960s. They employ continuous values rather than discrete ones. These computers therefore operate on an analogue signal.

2.Digital computers:


A digital electronic computer is a type of computer that is both an electrical computer and a digital computer, according to computer science. Digital electronic computers include devices like the Apple Macintosh, the IBM PC, and contemporary smartphones.

3.Hybrid computer:


Hybrid computers are computers that exhibit features of analog computers and digital computers. The digital component normally serves as the controller and provides logical and numerical operations, while the analog component often serves as a solver of differential equations and other mathematically complex problems. 

History of computer:

An abacus was one of the earliest and most well-known tools. The first mechanical computer was then being developed by Charles Babbage, the inventor of computers, in 1822. Finally, he created an analytical engine, a general-purpose computer, in 1833.