Computer & TechnologyMahidol Wittayanusorn School1 History of Computers ง เทคโนโลยีสารสนเทศ พื้นฐาน

Computer & TechnologyMahidol Wittayanusorn School2 Wilhelm Schickhard (1623) the machine for calculating astronomical tables. The machine could add and subtract six-digit numbers, and indicated an overflow of this capacity by ringing a bell. not programmable Astronomer & mathematician

Computer & TechnologyMahidol Wittayanusorn School3 Blaise Pascal (1642) The second mechanical calculator “Pascaline” A decimal machine Mathematician & Physicist Pascaline

Computer & TechnologyMahidol Wittayanusorn School4 Charles Babbage (1822) Father of modern computer who originated the idea of a programmable computer Punch cards wanted more accuracy in calculations Mathematician, philosopher, mechanical engineer, computer scientist

Computer & TechnologyMahidol Wittayanusorn School5 Charles Babbage (1822) Mathematician, philosopher, mechanical engineer, computer scientist The London Science Museum's replica difference engine, built from Babbage's design.Science Museumreplica The design has the same precision on all columns, but when calculating converging polynomials, the precision on the higher- order columns could be lower. converging

Computer & TechnologyMahidol Wittayanusorn School6 Herman Hollerith (1889) Statistician developed a mechanical tabulator based on punched cards to rapidly tabulate statistics from millions of pieces of data. tabulatorpunched cards

Computer & TechnologyMahidol Wittayanusorn School7 Konrad Zuse (1938) Built first working mechanical computer, the Z1 Engineer & Computer pioneer Konrad Zuse in 1992 Built first working mechanical computer, the Z1 Binary machine German government decided not to pursue development -- W.W.II already started

Computer & TechnologyMahidol Wittayanusorn School8 ENIAC (1943) Electronic Numerical Integrator And Computer Designed by Mauchly and Echert of the University of Pennsylvania The first electronic computer BIG!  18,000 tubes  70,000 resistors  10,000 capacitors  6,000 switches  30 x 50 feet  30 tons  140 kW of power  Decimal number system used  Programmed by manually setting switches  5,000 additions per second

Computer & TechnologyMahidol Wittayanusorn School9 ENIAC (1943) Electronic Numerical Integrator And Computer Detail of the back of a section of ENIAC, showing vacuum tubes.

Computer & TechnologyMahidol Wittayanusorn School10 Took idea of ENIAC and developed concept of storing a program in the memory This architecture came to be known as the “Von Neumann” architecture Von Neumann & Goldstine John Von Neumann ( )

Computer & TechnologyMahidol Wittayanusorn School11 Generations of Electronic Devices Vacuum tube Transistor Small scale integration on Up to 100 devices on a chip Medium scale integration - to ,000 devices on a chip Large scale integration , ,000 devices on a chip Very large scale integration to date 100, ,000,000 devices on a chip Ultra large scale integration Over 100,000,000 devices on a chip