1. Topic 1

2. EARLY RECORDS 4,500 YEAR OLD TAX RECORD  Early civilization used calculating devices for  Business  Taxes

3. Stonehenge – Built approximately 2800 BC Used to track equinoxes and solstices

4. ABACUSSOVIET ABACUS  Invented by the Babylonians in 3,000 BC  Used by the Greeks and Romans  Used for calculations

5. Pascal’s Adding Machine (17 th Century) Mechanical odometer Can add, subtract, multiply, and divide

6. EARLY ELECTRONIC COMPUTER ENIAC  Electronic Numerical Integrator And Computer (ENIAC)  Used 18,000 vacuum tubes  Used by U.S. Army to computer ballistic firing tables  Could add, subtract, divide, multiply, and square roots

7. MECHANICAL RELAY STILL USED IN CARS AND TRUCKS VACUUM TUBE RARELY USED ANYMORE

8. TRANSISTORSINTEGRATED CIRCUITS

9. FIRST MICROPROCESSOR 1971 INTEL (4-BIT) INTEL XEON MICROPROCESSORS

10. ALTAIR 8800 BILL GATES WROTE BASIC PROGRAMS FOR THIS SYSTEM XEROX PARC (1972) FIRST GUI

11. STEVE WOZNIAK AND STEVE JOBS – BUILT FIRST APPLE COMPUTER IN THEIR GARAGE APPLE II – THE FIRST COMPUTER SYSTEM BY APPLE

12. The circuit board for the first Apple Computers

13. APPLE – LISA THE FIRST GUI FROM APPLE IT FAILED BECAUSE IT WAS TOO EXPENSIVE APPLE – MACINTOSH VERY SUCCESSFUL