-
Jan 1, 1500
Abacus
-From 2700-2300 B.C.
-Was used for mathematical problems -
John Napier
-Invented logarithms which is the inverse operation of exponents -
Blaise Pascal
-Invented the Pascaline which was known as the first mechanical and automatic calculator. -
Analog
-started in 1800 and went until 1950
-similarity between like features -
Analog
-ended in 1950
-a similarity between like features -
Joseph Marie Jacquard
-Invented the Jacquard loom which was a weaving machine controlled by punched cards. -
Charles Babbage
-Designed a computer machine called The Difference Engine.
-Also created the Analytic Engine in 1834.
-Both were powered by steam and used hole punched cards to run. -
Morse Code
-Created by Samuel Morse
-a form of communication using dots and dashes -
Lady Ada Byron Lovelace
-She was the first computer programmer. -
Henry Hollerith
-created IBM -
vacuum tubes
-invented by Fleming
-made from glass
-size of a lightbulb -
FIRST GENERATION
-went from 1940-1956 -
Transistor
-invented by Shickley, Houser, and Bardeen
-Bell laboratories
- Used no heat and only a little electricity
-very small -
SECOND GENERATION
-went from 1956-1963 -
integrated circuit/silicon chip
-invented by Jack Kilby
-smaller than a dime
-had thousands of transistors on it -
THIRD GENERATION
-went from 1963-1971 -
Marcia E. Hoff
-Developed the first microprocessor
-Could put lots of storage on a small chip -
FOURTH GENERATION
-1971 to present
-microprocessor -
FIFTH GENERATION
-future
-nanotechnology
-Quantum
