History of Computer
HISTORY OF COMPUTERS
Historical records will tell us that man has invented three types of devices to assist him in calculating and processing data. These devices could be classified into: a) Manual-mechanical b) Electromechanical c) Electronic
2000 BC - MECHANICAL COMPUTER
THE ABACUS * Computations are done by sliding beads on a wire arranged on a tray. Came from the Greek word abax meaning flat surface John Napier(1617) – Logs and Bones * a Scotsman, invented logarithms which use lookup tables to find the solution to otherwise tedious and error-prone mathematical calculations.
Blaise Pascal 1642 – Arithmetic Engine * Invented the first mechanical calculator.
The Arithmetic Engine or Pascaline * used cogs and gears to solve math equations. Can add and subtract up to 8 digits.
Gottfried Wilhelm von Leibnitz 1670 - Stepped Reckoner * Invented a calculator which can multiply and divide directly as well as extract square roots.
Joseph Marie Jacquard 1800 – Jacquard’s Loom * First “programmable” machine. * Used punched cards (binary instructions) to automate weaving loom. * Punched cards were a staple of early and modern computer programming. * Milestone in the development of textile industry and data processing
Charles Babbage 1822 * the Father of Computers
Charles Babbage 1822 – Difference Engine by * It is a calculator which can compile accurate navigational and artillery tables
Charles Babbage 1835 –Analytical Engine * The machine has two components: the memory and the mill. * The memory or storage that holds all calculations. * The mill processes data fed to it.
Lady Augusta Ada – First Female Computer Programmer * Countless of Lovelace
Electronic Computer Systems First Generation:1943-1956 * Used vacuum tubes in electronic circuits. * Used punch cards to input and externally store data. * Up to 4K of memory. * Programming in machine
Historical records will tell us that man has invented three types of devices to assist him in calculating and processing data. These devices could be classified into: a) Manual-mechanical b) Electromechanical c) Electronic
2000 BC - MECHANICAL COMPUTER
THE ABACUS * Computations are done by sliding beads on a wire arranged on a tray. Came from the Greek word abax meaning flat surface John Napier(1617) – Logs and Bones * a Scotsman, invented logarithms which use lookup tables to find the solution to otherwise tedious and error-prone mathematical calculations.
Blaise Pascal 1642 – Arithmetic Engine * Invented the first mechanical calculator.
The Arithmetic Engine or Pascaline * used cogs and gears to solve math equations. Can add and subtract up to 8 digits.
Gottfried Wilhelm von Leibnitz 1670 - Stepped Reckoner * Invented a calculator which can multiply and divide directly as well as extract square roots.
Joseph Marie Jacquard 1800 – Jacquard’s Loom * First “programmable” machine. * Used punched cards (binary instructions) to automate weaving loom. * Punched cards were a staple of early and modern computer programming. * Milestone in the development of textile industry and data processing
Charles Babbage 1822 * the Father of Computers
Charles Babbage 1822 – Difference Engine by * It is a calculator which can compile accurate navigational and artillery tables
Charles Babbage 1835 –Analytical Engine * The machine has two components: the memory and the mill. * The memory or storage that holds all calculations. * The mill processes data fed to it.
Lady Augusta Ada – First Female Computer Programmer * Countless of Lovelace
Electronic Computer Systems First Generation:1943-1956 * Used vacuum tubes in electronic circuits. * Used punch cards to input and externally store data. * Up to 4K of memory. * Programming in machine