History of Computers

The Calculating Clock

Jun 27, 1623

The calculating clock is invented. It is the first mechanical calculator.

Binary mathematics first used

Jun 27, 1679

Binary mathematics are discovered and researched. This layed the foundation for all future digital computing.

First sold calculator

Jun 27, 1774

Phillip-Malthus Hahn sells a small number of his calculating device.

The first use of punch cards

Jul 3, 1803

punch cards are first used to reproduce complex patterns on an automatic loom.

First Mass Produced Calculator

Jun 27, 1820

first mass produced calculator, was sold in large numbers and used for many years.

Binary mathematics are first used in computing

Jul 3, 1840

They were used in an electro-mechanical calculator.

First punch card data processing machine

Jul 3, 1890

Dr Herman Hollerith builds the first punch card electro-mechanical data processing machine.

The z-1 was completed

Jul 3, 1938

The z-1 was completed.

Pascal the first programming language

Jul 3, 1971

Pascal, the first programming language, is invented.

The Antikythera Device

Jan 4, 1980

The first lunar calculator. It was made in Greece, and is important because it is the first mechanical calculator