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20,000 to 30,000 B.C
First numbers were recorded on bones
1800 B.C.
First place-value number system in place
1000 B.C. and 500 B.C
Abacus
300 B.C. and 500 A.D.
Zero and Negative Numbers
1500AD and 1900AD
lot of activities in the development of computing devices
Driven by commerce
1500
Leonardo da Vinci invented mechanical calculator
1621
slide rule
1625
Wilhelm Schichard’s mechanical calculator
1640
Blaise Pascal’s Arithmetic Machine
1800 AD
punched card
1830 AD
Difference Engine,
Analytical Engine,
Boolean Algebra
1857
Paper tape
1869 AD
Logic Machine
~1874
first Keyboard
1881
Rectangular Logic Diagrams
1886
first linked Boolean Algebra to circuits based on switches
1890
Venn diagrams,
Tabulating Machine
After 1900 AD
Vacuum tube
1906
triode
1926
first semiconductor transistor
1937
Turing Machine by Alan Turing
1939
1st digital computer model
1942 or 1943
COLOSSUS
1940s
ENIAC
1944-1952
EDVAC
1948
UNIVAC I
1956
EDVAC completed in _____
1961
first work on packet switching theory
1967
first plan for ARPANET
1968
team lead by Frank Heart and included Bob Kahn, developed IMP
Mid to late sixties
Developed less expensive but smaller computer
Minicomputer
Timesharing concept
Let to idea of networking
1971 and 1976
first microprocessor
1972
Intel - 8008
1972
virus
1974
truly general purpose microprocessor
After 1974
development exploded (Microprocessor)
Until mid 1970s
Development led by hardware
Computers were designed and software was designed to fit the hardware.
Personal computing industry began
1976
Apple I and Apple II microcomputer
1981
IBM joined the PC wars
1989
ARPANET ceased to exist
1989
World Wide Web
Proposal called HyperText and CERN
HyperText Markup Language (HTML)
HyperText Transfer Protocol (HTTP) a protocol
late 1989
Line-mode interface was developed & named at CERN
1991
Development World Wide Web
Central computer at CERN with few web pages
1992
Development World Wide Web
50 world wide
1993
Development World Wide Web
graphic user interface browser
Mosaic
Popularized and fueled growth of internet