Unit 1 PC Literacy & Systems Design Lesson 1 History of Computing Lesson 1 Write Why in your notebooks. do you think computers were invented? How have they helped us? Do you think they’ve hindered us in any way? Understand the events that lead to modern-day computing. Recount the history of personal computers. Identify the early pioneers of computing. Electronic digital computer is an invention of the 20th century Computer-like functions have been around for years Abacus Frenchman Joseph Marie Jacquard Automated a loom that operated by dropping needles through holes punched in cards Needles were either up or down (binary numbers) Jacquard Loom is considered a true digital computer Charles Babbage Difference Engine Performed complicated calculations using levers and gears Mechanical/Metal & complexity Performance hurt by expansion & contraction of metal components Imprecision Quality of the materials Technology of the day wasn’t up t the demand of Babbage’s design Short Video Herman Hollerith 1890 US Census Punched card machine to process census Later, he founded Hollerith Tabulating Company, which eventually became IBM 1940’s UPenn ENIAC credited as the first modern computer Programmed only by rewiring Vacuum tubes ENIAC used to help the military calculate weapons’ trajectories for WW II Measurement ENIAC 150 mHz Pentium Speed 5,000 additions per second 300,000,000 Memory 200 digits 16,000,000 Elements 18,000 vacuum tubes 10,000 capacitors 1,500 relays 6,000 switches 70,000 resistors 4,000,000 transistors (CPU) Size 10 feet tall x 1,800 square feet 9” X 12” X 3” Weight 30 tons 6 pounds Grace Hopper was a programmer hired to work on the Mark 1 and Mark II at Harvard University 1945 found a dead moth causing the machine to malfunction Term Debugging was born TRANsfer reSISTOR John Bardeen, William Shockley and Walter Brattain of Bell Laboratories Faster, more reliable, smaller, and much cheaper to build than a vacuum tube One transistor equivalent to 40 vacuum tubes Computer technology during 1959 - 1964 Packs a huge number of transistors onto a single wafer of silicon Robert Noyce (Fairchild Corporation) & Jack Kilby (Texas Instruments) Circuit boards/Motherboards 1965 - 1970 Single chip that can do all the processing of a full-scale computer Tedd Hoff (Intel) 1971 - Present ENIAC programming was tedious, timeconsuming Couldn’t be transferred from one computer to another Programming languages Computer applications Commodore, Atari Apple Corporation founded in 1976 Steve Jobs & Steve Wozniak VisiCalc (1st spreadsheet program) The PC revolution was on 1981 Microsoft (Bill Gates) bought DOS (Disk Operating System) and sold to IBM IBM PC took over the PC revolution begun by Apple Students before 1985 seldom had access to PC’s You may work in pairs or by yourself on the following assignment: Directions Due Thursday 9/11