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History Of Computers


View The Timeline Chart of the History of Computers

  • 1937- Dr. John V. Atanasoff and Clifford Berry designed and built the first electronic digital computer.


  • 1943- Alan Turing designs the Colossus, an electronic computer created for the military to break German codes. The existence of the computer was kept secret until the 1970s.
  • 1945- Dr. John von Neumann writes a paper describing the stored program concept.
  • 1946- Dr. John W. Mauchly and J. Presper Eckert, Jr. completed work on the first large-scale electronic, general-purpose digital computer.
  • 1947- William Shockley, John Bardeen, and Walter Brattain invented the transfer resistance device, eventually called the transistor.


  • 1951- The first commercially available electronic digital computer, the UNIVAC I (UNIVersal Automatic Computer), was introduced by Remington Rand.
  • 1952- Dr. Grace Hopper considered the concept of reusable software in her paper, "The Education of a Computer." The paper describes how to program a computer with symbolic notation instead of the detailed machine language that had been used.
  • 1953- The IBM model 650 was one of the first widely used computer systems.
  • 1957-  The IBM 305 RAMAC system was the first to use magnetic disk for external storage.
  • 1958- Computers built with transistors marked the beginning of the second generation of computer hardware.
  • 1959- More than 200 programming languages were created. IBM introduced two smaller, desk-sized computers: the IBM 1401 for business and the IBM 1620 for scientists.


  • 1960 - Dr. Grace Hopper headed a committee that developed a high-level business application language called COBOL.
  • 1964 - Third generation computers were introduced.
  • 1965 - DEC introduced the PDP-8. Dr. John Kemeny leads the development of BASIC computer programming language.
  • 1968 - Alan Shugart demonstrates the first regular use of an 8-inch floppy disk. Dr. Edsger Dijsktra introduced the concept of structured programming.
  • 1969 - The ARPANET network was established.


  • 1970 - Fourth-generation computers are built with chips that used LSI.
  • 1971 - Dr. Ted Hoff developed a microprocessor called the intel 4004.
  • 1975 - MITS, Inc., advertised the first microprocessor, the Altair. Ethernet was developed by Robert Metcalf.
  • 1976 - Steve Wozniak and Steve Jobs built the first Apple computer.
  • 1979 - Bob Frankston and Dan Bricklin write a spreadsheet program. CompuServe and the Source were founded.

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  • 1980 - Alan Shugart presented the Winchester hard drive.IBM offered Bill Gates the opportunity to develop the operating system for the IBM personal computer.
  • 1981 - The IBM PC was introduced.
  • 1982 - Hayes introduced the 300-bps smart modem. Compaq, Inc., was founded.
  • 1983 - Lotus Development Corporation is founded.
  • 1984 - IBM introduced a personal computer called the PCAT. Hewlett-Packard announced the first LaserJet printer. Apple introduced the Macintosh computer.
  • 1987 - Several personal computers with Intel 80386 microprocessor was introduced.
  • 1988 - Microsoft became the world's top software vendor.
  • 1989 - Tim Berners-Lee incents an Internet-based hypermedia enterprised called the World Wide Web. ISTE was formed.


  • 1991 - AskERIC started up.
  • 1992 - Microsoft released Windows 3.1.
  • 1993 - Several companies inroduced computers using the Pentium microprocessor from Intel. Marc Andreessen creates a graphical Web browser called Mosaic.
  • 1994 - Jim Clark and Marc Andreessen founded Netscape and launch Netscape Navigator 1.0. The Clinton Administration created the TIIP.
  • 1995 - Microsoft releases Windows 95. Sun Microsystems launches Java.
  • 1996 - PalmPilot's are introduced. Webtv was introduced.
  • 1997 - Intel introduced the Pentium II processor. DVD was introduced.
  • 1998 - Windows 98 was introduced. Apple Computer introduced the iMac.
  • 1999 - Microsoft introduced Office 2000.


  • 2000 - Intel unvieled its Pentium 4 chip.
  • 2001 - Microsoft released Microsoft Office 2001 suite for Macintosh. Apple Computers released Mac OS X.Wireless technology achieved significant market penetration. Microsoft released Windows XP Professional for business and advanced home computing and Windows XP Home Edition for home use.
  • 2002 - Microsoft released Pocket PC 2002. DVD writers began to replace CD writers.
  • 2003 - Wireless desktop computer components became commonplace. Intel released its new Centrino mobile technology. Microsoft released the Class Server Learner Management Platform. The tablet PC was introduced. Apple introduces the Pwer Mac G5 processor. Microsoft released the latest version of its flagship Office suite in numerous versions.
  • 2004 - Flat-panel LCD monitors overtook bulky CRT monitors as a popular choice of computer users. Apple Computer introduced the sleek iMac G5.
  • 2005 - Microsoft unveiled Windows XP Media Center Edition 2005. The smart phone overtook the PDA as the personal mobile device of choice. IBM introduced the Cell chip. Apple introduced the Mac mini.
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