1. Group #9: Glaze Aubrey Villanueva Researcher/Reporter-Invention AllaizaRochelle Velasquez PPT Creator/Reporter-Inventors Jahlen Tuvilleja Group Leader/PPT Editor&Designer/Reporter-Uses

2. Atanasoff-Berry Computer (ABC) The ABC was constructed between 1937 to 1942 at Iowa State University. 3. Descriptions: worlds first electronic-digital computer It weighed 750 lbs, computed 0.06 operations per second had 0.37 KB in memory. It was announced as an electrical computing machine with more than 300 vacuum tubes that would compute complicated algebraic equations. Ideas from the ABC were used in the design of ENIAC. 4. Dr. Vincent Atanasoff and Clifford Berry 5. Atanasoff-Berry Computer Demonstration 6. Uses : Using binary digits to represent all numbers and data. Performing all calculations using electronic rather than wheels, ratchets, or mechanical switches. Organizing a system in which computation and memory are separated. It could do 30 add/subtract operations per second. 7. ENIAC 8. Electrical Numerical Integrator And Calculator (ENIAC) They began making it in 1943 and ended in 1946 at the University of Pennsylvania. 9. Descriptions: The ENIAC was the first successful general purpose electronic digital computer that was built in during World War II. It had a speed of one thousand times that of electro-mechanical machines. It contained 17,468 vacuum tubes, along with 70,000 resistors, 10,000 capacitors, 1,500 relays, 6,000 manual switches and 5 million soldered joints. ENIAC was a modular computer, composed of individual panels to perform different functions. It costs almost $500,000 and required 6 full- time technicians to keep it running. 10. John Mauchly and J. Presper Eckert 11. Uses: In one second, the ENIAC (one thousand faster than any other calculating machine to date) could perform 5,000 additions, 357 multiplications and 38 divisions. It was used for many other applications. ENIACs field of application included scientific uses. 12. REFERENCE: http://spge- bg.com/index2.php?lang=en&mainB=1&subB=3&file=en/home/j_atanasoff.php http://www.computerhistory.org/revolution/birth-of-the-computer/4/99/391 http://computerhistory-darian.blogspot.com/2010/05/eniac.html http://inventors.about.com/od/bstartinventions/a/Clifford_Berry.htm http://history-computer.com/People/images/MauchlyPortrait.jpg http://history-computer.com/People/images/Eckert.jpg http://inventors.about.com/library/weekly/aa050898.htm http://encyclopedia2.thefreedictionary.com/Atanasoff-Berry+Computer http://jva.cs.iastate.edu/operation.php http://inventors.about.com/od/estartinventions/a/Eniac.htm http://airandspace.si.edu/research/dsh/ldc/ldc_part4.html http://library.thinkquest.org/21798/data/tqmainsite/eniac/ http://www.ideafinder.com/history/inventions/comeniac.htm http://www.youtube.com/watch?v=jqOWfAdO8Pw