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Period: Jan 1, 1200 to
Manual Calculators
Manual Calculators called abacus appeared in China in 1200 and Japan in 1600 -
Slide Rule
in 1621, an English mathematician constructed the first slide rule. -
Pascaline
Pascaline a mechanical device that could be used to perfom addition, subtraction, multiplication, and division. -
Difference Engine
Difference Engine, powered by steam power. Invented to quickly and accuratly calulate large tables of numbers. -
Analytical Engine
a general-purpose calculating device that was never finished. -
Hollerith Tabulating Machine
Used by the U.S. census bureau for the next generation of calculating machines. -
Period: to
The Atansoff-Berry Computer (ABC)
first computer using vaccum tubes was being created. -
ABC opens the way.
The ABC might not have been the best computer but it opneded the way for computing futrure. -
IBM sponsors an engineer
Howard Aiken, tried to intergrate 73 IBM accounting machines into one unified computing machine. -
COLOSSUS
Birtish developers created COLOSSUS -
ENIAC
Mauchly and Eckert started to create ENIAC -
Only 6?
Aiken thought that only 6 computers would be needed to satisfy the computing needs of the world. -
AT&T's transistors.
Second-generation computers came to our world. -
Transistors take over
transistors take over and replace vaccum tubes. -
UNIVAC
the first UNIVAC computer was created. -
Period: to
UNIVAC in houses.
UNIVAC was delivered to customers. -
Independent Integrated Circuits
Texas Instruments develpoed the first independently intergrated circuts. -
DEC
Dec introduced the DEC PDP-8, the first commercially succesful minicomputer. -
6800 9-bit micro processor
Motorala release the first bit micro processor. -
Z80 microprocessor.
Zilog introuduce the Z80 microprocessor and enhanced 8080 microprocessor. -
Apple I
Steve Jobs and Steve Wozniak founded the Apple Computer. -
Compaq
Compaq bought DEC and became a new computer company. -
IBM AS/400
the IBM AS/400 became known as a minicomputer.