What is Computer

What is Computer ? ‚Äč

The Functionality of Computer.

What is Computer ?

The Functionality of Computer.

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Computer¬†is a word derived from a word “compute” which means to calculate. A computer is a electronic device that performs our essential tasks according to our instruction and ¬†accepts¬†information¬†in the form of¬†Digitalized¬†data or Binary data and A computer is capable for storing data, making necessary changes to it, and providing data on demand again and again and much more, and manipulates it for some result based on a¬†program,¬†software,¬†or sequence of instructions on how the data is to be processed.


Complex computers include the means for storing data (including the program, which is also a form of data) for some necessary duration. A program may be invariable and built into the¬†computer hardware¬†(and called¬†logic circuitry¬†as it is on¬†microprocessors) or different programs may be provided to the computer (loaded into its storage and then started by an administrator or user). Today’s computers have both kinds of¬†programming.

Categories on the basis of technology ?

  1. Digital Computer
  2. Analog Computer
  3. Hybrid Computer

Evolution of computer

When computers were started, a computer was capable of doing only one task, but today due to the evolution, a computer can handle many tasks at a time, and artificial intelligence (AI) is coming into it.
We can divide the gradual development of computers into these five parts-

  1. First generation computers: (1940-1956) based on Vacuum tubes.
  2. Second generation computers: (1956-1963) based on Transistors
  3. Third generation computers: (1964-1971) based on Integrated Circuits
  4. Forth generation computers: (1971- Present) Based on Microprocessors
  5. Fifth generation computers: (Present – Future) based on Artificial Intelligence

How many types of computers are ?

  1. Analog computer Рrepresents data by measurable quantities
  2. Desktop computer Рa personal computer that fits on a desk and is often used for business or gaming
  3. Digital computer – operates with numbers expressed as digits
  4. Hybrid computer Рcombines features of both analog and digital computers
  5. Laptop (notebook) Рan easily transported computer that is smaller than a briefcase
  6. Mainframe (big iron) computer Рa centralized computer used for large scale computing
  7. Microcomputer Рgenerally referred to as a PC (personal computer). Uses a single integrated semiconductor chip microprocessor.
  8. Minicomputer Рan antiquated term for a computer that is smaller than a mainframe and larger than a microcomputer
  9. Netbook Рa smaller and less powerful version of a laptop
  10. Personal computer (PC) Рa digital computer designed to be used by one person at a time
  11. Supercomputer Рa high performing computer that operates at extremely high speeds
  12. Tablet computer (tablet PC) Рa wireless personal computer with a touch screen
  13. Workstation Рequipment designed for a single user to complete a specialized technical/scientific task

Which Operation System does Computer Support ?

Computer supports many type of Operating System (OS) like

  1. Windows (Most Commonly Used OS)
  2. Linux
  3. Ubuntu
  4. Mac Os (Apple)
  5. Parrot OS
  6. Google OS 
  7. And lots of more Operating system are available

What are the important part of a Computer ?

All the listed below hardwares are required for a Computer (PC)

  1. CPU (Central Processing Unit)
  2. MotherBoard
  3. Ram
  4. Hard Disk Drive (HDD)  or Solid State Drive (SSD)
  5. SMPS (Switched Mode Power Supply)
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What is The full Form of Computer ?

The Full Form of Computer is a Commonly Operated Machine Particularly used for Technical and Educational Research.

History of the Modern Computer.

Most histories of the modern computer begin with the¬†Analytical Engine¬†envisioned by¬†Charles Babbage¬†following the mathematical ideas of¬†George Boole, the mathematician who first stated the principles of logic inherent in today’s digital computer. Babbage’s assistant and collaborator,¬†Ada Lovelace, is said to have introduced the ideas of program loops and subroutines and is sometimes considered the first programmer. Apart from mechanical calculators, the first really useable computers began with the¬†vacuum tube, accelerated with the invention of the¬†transistor, which then became embedded in large numbers in¬†integrated circuits, ultimately making possible the relatively low-cost personal computer.

Modern computers inherently follow the ideas of the stored program laid out by John von Neumann in 1945. Essentially, the program is read by the computer one instruction at a time, an operation is performed, and the computer then reads the next instruction.

From the mid-1900s to the present, the advancement of computers is divided into five generations. While the year span for each generation varies depending on the reference source, the most recognized generational timeline is below.

1940 to 1956 (First generation computers )

First generation computers were room-sized machines that used vacuum tubes for circuitry and magnetic drums for limited internal storage. These machines used punched cards for data input and a binary machine code (language). Examples of first generation computers include the ABC (Atanasoff Berry Computer), Colossus, IBM 650 and the EDVAC (Electronic Discrete Variable Computer).

1956 to 1963 (Second generation computers )

Second generation computers replaced vacuum tubes with transistors, used magnetic tape storage for increased storage capacity, used BAL (basic assembler language) and continued to use punched cards for input. Transistors drew less power and generated less heat than vacuum tubes. Examples of second-generation computers include the IBM 7090, IBM 7094, IBM 1400, and the UNIVAC (Universal Automatic Computer).

1964 to 1971 (Third generation computers )

Third generation computers used ICs (integrated circuits) with several transistors and MOS (metal oxide semiconductor) memory. Smaller, cheaper and faster than their predecessors, these computers used keyboards for input, monitors for output, and employed programming languages such as FORTRAN (Formula Translation), COBOL (Common Business Oriented Language) and C-Language. Examples of third generation computers include the IBM 360 and IBM 370 series.

1972 to 2010 (Fourth generation computers )

Fourth generation computers used integrated circuits and microprocessors with VLSI (very large scale integration),¬†RAM¬†(random access memory),¬†ROM¬†(read-only memory), and high-level programming languages including C and¬†C++. The creation and expansion of the¬†World Wide Web¬†and¬†cloud computing¬†(the ability to deliver hosted services using the¬†Internet) significantly enhanced computing capabilities during this period. Examples of fourth generation computers include Apple’s¬†Macintosh¬†and IBM’s PC.

2010 to till Now (Fifth generation computers )

Fifth generation computers are based on AI (artificial intelligence), use large scale integrated chips and more than one CPU (processor). Fifth generation computers respond to natural language input, solve highly complex problems, make decisions through logical (human-like) reasoning and use quantum computing and nanotechnology (molecular manufacturing). Fifth generation computers and programs allow multiple programs (and computers) to work on the same problem at the same time in parallel.

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