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Electro mechanical Age

Electronic Age

  • Four Basic Period of Computer History

Pre Mechanical Age

Mechanical Age

Pre-Mechanical Age(3000B.C. - 1450 A.D.)

Writing and Alphabets

Petroglyths (signs or simple figures carved in rock)

Petroglyths

Cave painting from Lascaux, France(15,000-10,000 B.C.)

Ideographs (symbols to represent ideas and concept)

Mayan Ideograph

Cuneiform – the first true written language and the first real information system. (coo-nay-eh-form)Star – heaven or God

Cuneiform

At around 2000 BC the Phoenicians created symbols that expressed single syllables and consonants (the first true alphabet)

Greek adopted the Phoenician alphabet and added vowels

Romans gave the letters Latin name to create the alphabet we use today.

The First Calculator

Abacus – was man’s first recorded adding machine. Invented in Babylonia and popularized in China

Wilhelm Shickard – 1623 - (Professor at University of Tubingen, Germany) – invented the first mechanical calculator that can work with six digits and can carries digits across columns.

Blaise Pascal (1642) – invented the Pascaline. (made of clock gears and levers) that could solve mathematical problems like addition and subtraction.

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