What is Computer?
The computer is a modern Electronics Device that can work swiftly. The word “Computer” came from the Greek word “Compute”. The meaning of ‘compute’ is to count. Actually, the Computer is a counting machine. But the computer does not count only. It can make decisions logically. Thus computer is a machine so it has no thinking power. That is why it cannot work without our instructions.
What is Microcomputer?
The computer that makes with one Microprocessor is called a Microcomputer. Another name of Microcomputer is Personal computer or PC). One man can use one computer at a time. Thus its size is small and its price is cheap so we use it for personal, business, office, entertainment and so on. Example of Microcomputer_ IBM PC, Macintosh, etc.
===Classification of computers===
According to using purpose, there are two types of computer.
- General Purpose computer
- Special Purpose computer
According to Internal structure, working method & display data there are three types of computer.
- Analog Computer
- Digital computer
- Hybrid Computer
According to size, speed, storing capacity, accuracy, efficiency, etc there are four types of computer.
- Mainframe computer
- Microcomputer or personal computer.
Describe the main parts of a microcomputer-
The computer is a vast system. It consists of many electronic components. There are electromagnetic, electro-mechanical components also. These components are called the Hardware of a computer. A modern computer consists of mainly 5(five) units.
- Main memory.
- Arithmetic & Logical Unit (ALU)
- Input Device
- Output Device
- Control unit
Describe the main unit of a digital computer.
A modern computer has the following unit-
- Monitor (like a TV)
- System unit
A system unit has the following unit-
- Varieties types of electronic card
- Floppy disk drive
- Hard disk drive
- Connecting wire
- Power supply unit
A motherboard consists of the following parts-
- Recharge battery
- Varieties types of slots
- Varieties types of connector
- Varieties types of ports etc.
- DVD_Digital Versatile (Video) Disk