In 1979, two M.I.T. computer-science alumni and a Harvard Business School graduate launched a new piece of computer software for the Apple II machine, an early home computer. Called VisiCalc, short ...

The first electronic computer was built during the 1940s by John Vincent Atanasoff, a professor of physics and mathematics at Iowa State University, and one of his students, Clifford E. Berry. But the ...

C. 2500 BCE: Sumerian abacus -- c. 700 BC: Scytale -- c. 150: Antikythera mechanism -- c. 60: Programmable robot -- c. 850: "On Deciphering Cryptographic Messages" -- c. 1470: Cipher disk -- 1613: ...