History of Computers, Computer Fundamental Notes

History of Computers | Computer Fundamental Notes

Computer Fundamental Notes

History of computers that means in which time period computing machine are developed.

Table of Contents


  • ABACUS was invented by Chinese People in 2500 – 3000 BC.
  • This is the first calculating machine made up of wooden frame with beads or balls sliding on wire.
  • It consists of bars in horizontal positions on which sets of beads are inserted.

Slide Rule:

  • Slide Rule was invented by William Oughtred in 1622.
  • First analog device that works on the principle of logarithms.
  • It used for Multiplication, Division, Roots, Trigonometry, Logarithm, Exponentiation etc.
Slide Rule
Fig: Slide Rule

Napier’s Bone:

  • Napier’s Bone was Developed by English Mathematician John Napier in 1617 AD.
  • Used for Multiplication.
  • Also used for dividing and taking square root.
Napier's Bones
Fig: Napier’s Bones

Pascal’s Calculator:

  • Pascal’s Calculator was developed by Blaise Pascal in 1642.
  • It is a Mechanical Calculator capable for addition and subtraction.
  • In this machine, numbers were entered by dialing a series of numbered wheels each wheel having numbers from 0 to 9.
  • It could perform addition and subtraction up to 8 digits.
Pascal's Calculator
Fig: Pascal’s Calculator

Difference Machine:

  • Difference Machine was developed by Charles Babbage (called Fathers of computer) in 1821-22.
  • It able to perform complex mathematical calculation with 31 digits of precision.
  • Used to solve polynomial equations.

Analytical Engine:

  • Analytical Engine was developed by Charles Babbage in 1837.
  • General programmable machine.
  • Able to Addition, subtraction, multiplication and division through the use of stored program.
Difference Machine

And here we listed others important inventions:

  • Atanasoff Berry Computer (ABC) in 1942: First electronic digital computer
  • Hardvard Mark-I in 1944: First automatic electromechanical computer
  • ENIAC (Electronic Numerical Integrator and Calculator) in 1946: First general purpose electronic computer.
  • EDVAC (Electronic Discrete Variable Automatic Computer) : First Store program computer.
  • EDSAC (Electronic Delay Storage Automatic Computer): First practical stored program electronic computer.
  • UNIVAC-I (Universal Automatic Computer): First general purpose electronic digital Computer. it is also called the first commercial computer.

Computer Definition, Features, Capabilities & Limitations and Application Are of Computer

Leave a Reply

Your email address will not be published. Required fields are marked *