History of computer:

• A brief history of computer is pointed below:
  History of computer was started when the people in the early civilization started keeping records of transaction on clay. This was the starting of history of computer in 1200BC.
  • Actual computing started around 300BC when Babylon invented the ABACUS.
  • In 1642, Blaise pascal invented a gear driven adding machine which we called a calculator now a days but its name was PASCALENE, which was the first mechanical adding machine.
  • In 1673, Leibnitz developed a machine named STEPPED RECKONER that could multiply.
  • In 1801, jacquard constructed a LOOM, which was the first machine programmed with punched cards.
  • In 1822, Charles Babbage designed and build first DIFFERENCE ENGINE which was certificated the first mechanical computer. So he is known as the father of computer science.
  • In 1842, lady Ada Augusta Lovelance wrote the first program for the difference engine made by Babbage.
  • In 1847, Babbage designed his second version of difference engine but it could not be completed and was conceived on 1891 by the science museum in England.
  • In 1854, George Bool developed Boolean logic, which is the system for symbolic and logical reasoning and basis for computer design.
  • In 1890, PUNCHED CARD machine was developed in USA.
  • Before the development of vacuum tubes all the machines were mechanical.
  • The first electronic computer ENIAC (electronic numerical integrators and computer) was built in 1946.
  • After the many machine like EDVAC (Electronic discrete variable automatic computer), IBM 701, 704 were built using transistors instead of vacuum tubes.
  • In 1961, integrated circuit(IC) chips were commercially available.
  • Science then computers uses ic’s instead of transistors.
  • IBM 360 (international business machine) and DEC PDP 8 (programmed data processor, digital equipment corporation) were the most popular machine at that time.
  • Altair 8800 was the first easily available PC(personal computer)
  • In 1891, IBM launched the PC.
  • Science then, there has been significant development in the field of microelectronics and microprocessor.
  • Today there are lots of microprocessor with more then 2GHz (Gigahertz) processor on our desktop and 8 GB (Gigabyte) and more of memory and more than 500GB (Gigabyte) of storage.