Timeline: Comp History

Dec 14, 1623

Schickards calculator

Had a series of interlocking gears and each gear represented a digit.

Period: Dec 14, 1623 to Dec 14, 1820

Mechanical Calculators

Run By humans without Battery power not much thinking required

Dec 14, 1642

Pascaline

Couldbe used to preform addition, subtraction, multiplaction and division.

Dec 14, 1673

Leibniz Calculator

created

Dec 14, 1820

De Colmar's Arithmometer

Frist mass produced calculator ran on a crank. Audsley, A.A. (2002). In the beginning. Retrieved from http://www.oldcomputers.arcula.co.uk/hist2.htm

Dec 14, 1822

Difference Engine

Ran on steam power could quickley calculate large tables of numbers. Peter Markiewicz, P.M. (2009). plyojump - computer history. Retrieved from http://www.plyojump.com/classes/pre_1945.html

Period: Dec 14, 1822 to Dec 14, 1890

Computers without Human interaction

At this time computers could preform mathmatical tasks without people.

Dec 14, 1834

Analytical Engine

Never completed resembled modern computers

Dec 14, 1890

The Hollerith Tabulating Machine

used punchcards opperated with minimal human interaction.

Dec 14, 1939

Harvard Mark I

was digital but used decimal numbers rather that binary.

Period: Dec 14, 1939 to Dec 14, 1943

Computer prototypes

a generation of computers that used binary code and vacume tubes to opperate most were made arrounf WWII

Dec 14, 1942

Atanasoff-Berry Computer (ABC)

Frist to use vacume tubes instead of mechanical switches for circutry

Dec 14, 1943

Collossus

British computer made to break german codes during WWII

Dec 14, 1945

ENIAC

Used by the army to caluclate the trajectory tables. Mike Muuss , M.M. (2009). Eniac. Retrieved from http://www.mrsec.wisc.edu/Edetc/SlideShow/slides/computer/eniac.html

Period: Dec 14, 1945 to Dec 14, 1951

Frist generation of computers

All had vacume tubes to store individual bits of data, they also consumed alot of power. They ueed LDA an JNZ code

Dec 14, 1947

AT&T's transistor

portable small radios changed the way computers were made

Period: Dec 14, 1947 to Dec 14, 1958

Second Generation Computers

Seccond genertation computers had transiistors instead of vacume tubes this saved alot of space and engery
-The book just says to late 1950s so i put 58 as end date

Dec 14, 1951

Univac

frist commericaly successful computer

Period: Dec 14, 1958 to Dec 14, 2009

Third Generation Computers

Computers that used micro processors to run they were much smaller then previous computers.

Dec 14, 1965

IBM 360

One of the frist computers to use intergrated circuts to run. Graham Kendall , G.K. (2009). Welcome to g53ops: operating systems. Retrieved from http://www.cs.nott.ac.uk/~gxk/ops/2009/

Dec 14, 1965