1. The abacus is believe to be invented by the Babylonians between 100 BCE. and 500 BCE.
2. Blaise Pascal invented the first mechanical calculator, called the Pascaline Arithmetic Machine in 1642
3. 1804 - French silk weaver Joseph-Marie Jacquard build a loom that read holes punched on a series of small sheets of hardwood to control the pattered weaved. This automated machine introduced thye use of punch cards.
4. 1890 - The U.S Census Bureau adopted Dr. Herman Hollerith's Punch Card Tabulating Machine and Sorter, the first electromechanical machine that could read punch card.
5. The Computing-Tabulating Recording Company, formed by herman Hollerith in 1896. Today the company is called International Business Machine (IBM).
6. Dr, John V. Atanasoff and Clifford Berry build the first electronic computer (ABC - Atanasoff-Berry Computer) in 1937.
7. The Mark I, considered to be the first digital computer was introduced by IBM. It was more than 50 feet long and weight almost 5 tons.
8. 1946 - electronic numerical integrator and computer ENIAC, the world's first large-scale, general purpose electronic computer was invented. ENIAC, which was the brainchild of John William Mauchly and J. Presper Eckert Jr.
9. John Bardeen, Walter Brattain and William Shockley invented the transistor in 1947. They won the Nobel Prize for their invention in 1956.
10. The UNIVAC 1, the first computer to be mass produced for general use was introduce by Remington Rand in 1951. In 1952 it was use to analyzed votes in the US presidential election and correctly predict Dwight D. Eisenhower's victory.
11. The COBOL Language was developed by the committee headed by Dr. Grace Hopper.
12. The first "mouse" was invented by Doug Engelbart in 1964.
13. INTEL Corporation was founded by Robert Noyce and Gordon Moore in 1968.
14. Tim Berners-Lee of CERN created the World Wide Web in 1989.
15. IBM introduced the IBM PC in 1981. This DOS-based PC used a 4.77.MHz 8088 CPU with 64 KB of RAM and quickly became the standard for business PCs.
16. In 1879, the legendary American inventor Thomas Alva Edison publicly exhibited his incandescent electric light bulb for the first time.
17. In 1906, the American inventor Lee de Forest introduced a third electrode called the grid into the vacuum tube. The resulting triode could be used as both an amplifier and a switch, and many of the early radio transmitters were built by de Forest using these triodes (he also presented the first live opera broadcast and the first news report on radio).
18. In April 1975, Bill Gates and Paul Allen founded Microsoft
19. The term "weblog" was coind in 1997 by John Barger.
For more info, see: A History of Computers