Computer

 Hello guys 

Welcome to my new computer .

Let's start 

Computer

1. An electronic device that consists of hardware and software.

2. Hardware components describe the physical parts of the computer.

3. Software controls hardware and run the operating system, different programs and applications.

4. A cating r system comprises a CPU, memory, input/output devices and storage devices.

History

1. It started with the birth of abacus, a wooden rack holding two horizontal wires with beads strung on them.

2. In 1642, first mechanical computer was developed by Blaise Pascal in 1642.

3. In 1833, Charles Babbage conceived an automatic calculator or computer which is why he is called as the Father of computer.

4. In 1890, Punched cards (Tabulating machine) were used by Herman Hollerith and James Powers. These could read the information that had been punched into the cards automatically without human help.

5. Punch cards using computers (Turing machine) was created by IBM (International Business Machines). These were electromechanical devices. These could add, multiply and sort.

6. In 1945, ENIAC (Electronic Numerical Integrator and Computer), a high speed electronic computer was developed by John P. Eckert, John W. Mauchly and their associated at Moore school of Electrical Engineering of University. It was formally introduced in 1946. It occupied entire 30 by 30 feet room. Was about 1000 times faster than previous computers and used 18,000 vacuum tubes.

In 1950, magnetic core memory and transistor circuit element of digital computer were used. In 1980s, manufacturing of semi-conductor chips was done.

TYPES OF COMPUTER

  On the basis of data handling capabilities, there are three types of computers:

1. Analog computer

2. Digital computer

3. Hybrid computer

Let's start,

1.Analog Computer

 These involve data that continually changes and does not have discrete values. Eg: Mercury thermometer, Speedometer

2. Digital Computer

 These accept the raw data as input, done in binary numbers (0 and 1). Eg: Laptop, Desktops, Smart phones etc.

3. Hybrid Computers

 These have features of both digital and analog computers. These can process both discrete and continuous data.

 Eg: processors used in petrol pumps ( as they calculate both quantity and price).

On the basis of computing power and speed there are following types of computer:

1.Personal computer

2. Workstation

3. Minicomputer

4. Main frame

5. Super computer

6.Quantum computer 

1. Personal Computer or Microcomputer

Based on microprocessor technology enabling manufacturers to put an entire CPU on a single chip. Eg: Laptop or notebook computer.

2. Workstation.

Computer that is used explicitly for engineering applications like CAD/CAM, software development, desktop publishing.

3. Mini Computer

 Comparatively larger than micro computer. 5 to 50 times more power than micro computer.

4. Mainframe Computer

 More than 100 people can work at a time on different terminals by time sharing and multitasking techniques.

5. Super Computer

 Very powerful, most expensive, fastest computers. Able to process most complex jobs with a very high speed. The first supercomputer was developed in 1976 by Roger Cray.

6. Quantum Computer

• Development of this type of computer is in final stage. In quantum computers, Q-Bit will be used in lieu of Binary Bits.