Images of ComputersTopic 1

A Brief History

EARLY RECORDS 4,500 YEAR OLD TAX RECORD

Early civilization used calculating devices for Business Taxes

A Brief History

Stonehenge – Built approximately 2800 BCUsed to track equinoxes and solstices

A Brief History

ABACUS SOVIET ABACUS

Invented by the Babylonians in 3,000 BC

Used by the Greeks and Romans

Used for calculations

A Brief History

Pascal’s Adding Machine (17th Century)Mechanical odometerCan add, subtract, multiply, and divide

A Brief History

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

The Basics

MECHANICAL RELAYSTILL USED IN CARS AND TRUCKS

VACUUM TUBERARELY USED ANYMORE

The Basics

TRANSISTORS INTEGRATED CIRCUITS

The Basics

FIRST MICROPROCESSOR1971 INTEL (4-BIT)

INTEL XEON MICROPROCESSORS

The Basics

ALTAIR 8800BILL GATES WROTE BASIC PROGRAMS FOR THIS SYSTEM

XEROX PARC (1972)FIRST GUI

The Basics

STEVE WOZNIAK AND STEVE JOBS – BUILT FIRST APPLE COMPUTER IN THEIR GARAGE

APPLE II – THE FIRST COMPUTER SYSTEM BY APPLE

The Basics

The circuit board for the first Apple Computers

The Basics

APPLE – LISATHE FIRST GUI FROM APPLEIT FAILED BECAUSE IT WAS TOO EXPENSIVE

APPLE – MACINTOSHVERY SUCCESSFUL