-
Schickards calculator
Had a series of interlocking gears and each gear represented a digit. -
Period: to
Mechanical Calculators
Run By humans without Battery power not much thinking required -
Pascaline
Couldbe used to preform addition, subtraction, multiplaction and division. -
Leibniz Calculator
created -
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 -
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: to
Computers without Human interaction
At this time computers could preform mathmatical tasks without people. -
Analytical Engine
Never completed resembled modern computers -
The Hollerith Tabulating Machine
used punchcards opperated with minimal human interaction. -
Harvard Mark I
was digital but used decimal numbers rather that binary. -
Period: to
Computer prototypes
a generation of computers that used binary code and vacume tubes to opperate most were made arrounf WWII -
Atanasoff-Berry Computer (ABC)
Frist to use vacume tubes instead of mechanical switches for circutry -
Collossus
British computer made to break german codes during WWII -
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: to
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 -
AT&T's transistor
portable small radios changed the way computers were made -
Period: to
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 -
Univac
frist commericaly successful computer -
Period: to
Third Generation Computers
Computers that used micro processors to run they were much smaller then previous computers. -
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 PDP-8
Frist commercially sucessful microcomputer. -
Mark 8
Forerunner to modernday computers -
6800 8-bit microprocessor
Devlopeed by motorola -
Mits Aitair
1/3rd the price of a volkswagen Bettle 256 kb of memory -
Apple 1
Apples frist computer made by steve jobs. -
Z80 microprocessor
devolped by Zilog
