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Early calculations Devices
Abacus
-Invented 5000 years ago by the chinese
Napiers bones
-In 1617 created by John Napier. Rectangular rods marked with numbres on them
Pascaline
In 1642 invented by Elaise Pascal a computing machine know as Pascaline
BadBage´s Analitical Engine
In 1822 Chales Badbage developed a machine know as difference Engine that perform mathematical operations automatically
Tabulating machine
In 1890, Herman Hoilefith invented a tabulating machine was used in census
The first Electro- Mechanical computer
MARK 1-
In 1944. Prof Howard Aiken built the first electro mechanical computers named Mark 1
The first electronic computer
Eniac and Univac
John Mouchly and John presper Eckert together built it known as ENIAC was 10 feet wide 100 feet long
PC
-Smaller in size, faster in speed, more accurate, and more reliable
Generation
Univac --) PC --) Desktop computer
Smartphone (-- Table-- pc-- notebook--all--in--one--pc --raspberry
Generations of computer
(1946-1958)
-They used vacuum tube tecnology
-They used Machine language
-They size was very big
-They were very expensive
-They produced a lot of heal
-They operating speed was very slow
-They were not much reliable
ENIAC-UNIVAC
(1959-1964)
IBM 140
-They used transistors
-They used assembly lenguage
-They cost got reduced
-The size become faster
-They produced a lot of heat
IBM-360, ICL 1900
-They used integrated circuits (ICS)
-They used high-level language like fortran and cobol
-The size became smaller
-They generated less neat and were more, reliable
(1971- onwards)
-They use microprocessor
-They use high-level lenguage like C-Ctt, and java
-They are multipurse computers
-They are accurate, reliable, and very fast
Intel 4004
Fifth generation (Present - Beyond)
Actual PC
- They fifth generations will use super large scale intergrated chips
-Have artifici intelligence
-They will be able to recognize images and graphs
-They are intended to work with natural language.
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