History of Computers

Abacus

Jan 1, 1500

First device known to carry calculations. (Addition+Subtraction)

Pacaline

Jan 2, 1600

Made by Blaise Pascal in 1642. COuld calculate sums up to eight numbers long.

Multiplacation + Divison Device

Jan 1, 1700

Device that contains Multiplication, Division, Addition and Subtraction is made by Gottfried con Leibniz.

French Weaver

Jan 21, 1819

Joseph Jacquard invents a machine which did something with holes and weaving and stuff.

First Computers

Jan 21, 1850

Charles Babbage made two computerss

Electric Machine by herman Hollerith

Jan 21, 1900

Electric machine that ran on electricity and used ounched cards to store data. Vwery sucessful

Mark I

Dec 21, 1944

made by IBM at HU was 52 ft long, weight 50 mtons and had 750k parts.

UNIVAC

Jan 21, 1951

Built and sold to U.S. Census Bureu.

Transistor invented

Jan 21, 1956

The transsistor is made and makes all computers smaller and more reliable.

First Apple computer

Jan 21, 1970

First Apple computer is made by Steven Jobs and Stephen Wozniak in their own garage.

First PC

Jan 21, 1981

Made By IBM