The first use of the word "computer" was recorded in 1613.
Tally Sticks: A tally stick was an ancient memory aid device to record and document numbers, quantities, or even messages.
Abacus: The abacus was invented in Babylonia in 2400 B.C.
Napier’s Bones: Invented by John Napier in 1614.
Stepped Reckoner: Invented by Gottfried Wilhelm Leibniz in 1672. The machine that can add, subtract, multiply and divide automatically.
Difference Engine and Analytical Engine: It an automatic, mechanical calculator designed to tabulate polynomial functions.Invented by Charles Babbage in 1822 and 1834. It is the first mechanical computer.
First Computer Programmer: In 1840, Augusta Ada Byron suggests to Babbage that he use the binary system. She writes programs for the Analytical Engine.
Scheutzian Calculation Engine: Invented by Per Georg Scheutz in 1843. Based on Charles Babbage's difference engine.The first printing calculator.
Tabulating Machine: Invented by Herman Hollerith in 1890. To assist in summarizing information and accounting.
Havard Mark 1: Also known as IBM Automatic Sequence Controlled Calculator (ASCC). Invented by Howard H. Aiken in 1943 • The first electro-mechanical computer.
Z1:The first programmable computer. Created by Konrad Zuse in Germany from 1936 to 1938. To program the Z1 required that the user insert punch tape into a punch tape reader and all output was also generated through punch tape.
Atanasoff-Berry Computer (ABC): It was the first electronic digital computing device. Invented by Professor John Atanasoff and graduate student Clifford Berry at Iowa State University between 1939 and 1942
UNIVAC 1: The UNIVAC I (UNIVersal Automatic Computer 1) was the first commercial computer. Designed by J. Presper Eckert and John Mauchly.
The First Portable Computer:Osborne 1 – the first portable computer. Released in 1981 by the Osborne Computer Corporation
The First Computer Company:The first computer company was the Electronic Controls Company. Founded in 1949 by J. Presper Eckert and John Mauchly.
