Computer: timeline
The marvels of electronic miniaturization that are modern PCs are a relatively recent development. They are the descendants of vacuum- tube devices introduced in the early 20th century. Here are some early landmark events in computer history:
1623: 1st Mechanical Calculator
German mathematician Wilhelm Schickard developed the1st mechanical calculator, capable of adding, subtracting, ultiplying,
and dividing.
1642: Pascal’s adding and subtracting machineFrench mathematician Blaise Pascal built anadding and subtracting machinethat he invented.
1801: French inventor Joseph Marie Jacquard demonstrated a new control system for looms. He “programmed” the loom, communicating desired weaving operations to the machine via patterns of holes in paper cards.
1833-71: Charles Babbage – Analytical Engine
British mathematician and scientist Charles Babbage used the Jacquard punch-card system in his design for a sophisticated,
programmable “Analytical Engine” that foreshadowed basic features of today’s computers.
1889: Punch-card tabulating system
American engineer Herman Hollerith patented an electromechanical punch-card tabulating system that facilitated the handling of large amounts of statistical data and quickly found use in censuses in the U.S.
1911: IBM
Hollerith’s Tabulating Machine Company merged with 2 other enterprises to form the Computing-Tabulating- Recording Company, renamed in 1924, the International Business Machines (IBM).
1941: Digital Computer
German engineer Konrad Ziise completed the Z3, the 1st fully functional digital computer to be controlled by a program; the Z3
was not electronic—it was based on electrical switches called relays.
1942: Iowa State College physicist John Vincent Atanasoff and his assistant Clifford Berry completed a working model of the 1st fully electronic computer, using vacuum tubes, which could operate much more quickly than relays; the rudimentary machine as
not programmable.
1944: Mark – I Computer
IBM and Harvard Professor Howard Aiken completed the 1st large-scale automatic digital computer, the Mark- I, a relay-based machine 55 feet long and 8 feet high. 1943: British scientists built the Colossus, an electronic computer designed specifically for breaking German codes.
1946: ENIAC
Electronic Numerical Integrator and Computer, a 30-tonne room-sized electronic computer with over 18,000 vacuum tubes,
was completed by physicist John Mauchly and engineer J. Presper Eckert at the University of Pennsylvania for the U.S. Army. Eniac could be programmed to do different tasks, although programming could take a couple of days, since cables had to be plugged in and switches set by hand.
1951: UNIVACEckert and Mauchly’sUnivac(“Universal Automatic Computer”) became the 1st computer commercially available in the U.S.
1969-71: Unix Operating System
The powerfulUnix operating system, was developed at Bell Laboratories; later versions became widely used on large computers
and formed the basis for the popular Linux and Macintosh OSX operating systems for personal computers.
1971: Intel released the 4004, the 1st commercialmicroprocessor(an entire computer processing unit on a chip).
1973: The Alto computer, developed at Xerox’s Palo Alto Research Center, became operational, implementing many features used years later in commercial personal computers; including agraphical user interface(GUI) featuring windows, icons, a mouse, and pointers.
1975: The1st widely marketed personal computer, the MITS Altair 8800, was introduced in kit form, with no keyboard and no video display, for under $400.
1975:Microsoftwas founded by college dropouts Bill Gates and Paul Allen.
1976:The 1st word-processing programfor personal computers, the Electric Pencil, was written.
1976:AppleComputer Company was founded by Steven Jobs and Stephen Wozniak.
1977: Apple introduced theApple II; capable of displaying text and graphics in color, the machine enjoyed phenomenal success. 1981:IBMunveiled its“Personal Computer,”which used Microsoft’s DOS (disk operating system).
1984: Apple introduced the 1stMacintosh.The easy-to-use Macintosh came with a proprietary operating system and was the 1 st popular computer to have a GUI (graphical user interface) and a mouse.
1990: Microsoft releasedWindows 3.0, the 1st workable version of its own GUI.
1991:Linuxwas invented for the personal computer by Helsinki University student Linus Torvalds and made available for free.
1996: ThePalm Pilot,the 1st widely successful handheld computer and personal information manager, arrived.
2001: Apple introduced theUnix-based operating system OSXfor theMacintosh.
2002: The total number ofpersonal computers(PCs), including desktop and laptop machines of all types, shipped by manufacturers since 1975 reached 1 billion.
2005:Appleannounced it would start usingIntel microprocessorsin its Macintosh computers beginning in 2006. The Macintosh traditionally used microprocessors of a different design than the chips made by Intel and other companies that were found in the more than 90% of PCs running Microsoft Windows.
The marvels of electronic miniaturization that are modern PCs are a relatively recent development. They are the descendants of vacuum- tube devices introduced in the early 20th century. Here are some early landmark events in computer history:
1623: 1st Mechanical Calculator
German mathematician Wilhelm Schickard developed the1st mechanical calculator, capable of adding, subtracting, ultiplying,
and dividing.
1642: Pascal’s adding and subtracting machineFrench mathematician Blaise Pascal built anadding and subtracting machinethat he invented.
1801: French inventor Joseph Marie Jacquard demonstrated a new control system for looms. He “programmed” the loom, communicating desired weaving operations to the machine via patterns of holes in paper cards.
1833-71: Charles Babbage – Analytical Engine
British mathematician and scientist Charles Babbage used the Jacquard punch-card system in his design for a sophisticated,
programmable “Analytical Engine” that foreshadowed basic features of today’s computers.
1889: Punch-card tabulating system
American engineer Herman Hollerith patented an electromechanical punch-card tabulating system that facilitated the handling of large amounts of statistical data and quickly found use in censuses in the U.S.
1911: IBM
Hollerith’s Tabulating Machine Company merged with 2 other enterprises to form the Computing-Tabulating- Recording Company, renamed in 1924, the International Business Machines (IBM).
1941: Digital Computer
German engineer Konrad Ziise completed the Z3, the 1st fully functional digital computer to be controlled by a program; the Z3
was not electronic—it was based on electrical switches called relays.
1942: Iowa State College physicist John Vincent Atanasoff and his assistant Clifford Berry completed a working model of the 1st fully electronic computer, using vacuum tubes, which could operate much more quickly than relays; the rudimentary machine as
not programmable.
1944: Mark – I Computer
IBM and Harvard Professor Howard Aiken completed the 1st large-scale automatic digital computer, the Mark- I, a relay-based machine 55 feet long and 8 feet high. 1943: British scientists built the Colossus, an electronic computer designed specifically for breaking German codes.
1946: ENIAC
Electronic Numerical Integrator and Computer, a 30-tonne room-sized electronic computer with over 18,000 vacuum tubes,
was completed by physicist John Mauchly and engineer J. Presper Eckert at the University of Pennsylvania for the U.S. Army. Eniac could be programmed to do different tasks, although programming could take a couple of days, since cables had to be plugged in and switches set by hand.
1951: UNIVACEckert and Mauchly’sUnivac(“Universal Automatic Computer”) became the 1st computer commercially available in the U.S.
1969-71: Unix Operating System
The powerfulUnix operating system, was developed at Bell Laboratories; later versions became widely used on large computers
and formed the basis for the popular Linux and Macintosh OSX operating systems for personal computers.
1971: Intel released the 4004, the 1st commercialmicroprocessor(an entire computer processing unit on a chip).
1973: The Alto computer, developed at Xerox’s Palo Alto Research Center, became operational, implementing many features used years later in commercial personal computers; including agraphical user interface(GUI) featuring windows, icons, a mouse, and pointers.
1975: The1st widely marketed personal computer, the MITS Altair 8800, was introduced in kit form, with no keyboard and no video display, for under $400.
1975:Microsoftwas founded by college dropouts Bill Gates and Paul Allen.
1976:The 1st word-processing programfor personal computers, the Electric Pencil, was written.
1976:AppleComputer Company was founded by Steven Jobs and Stephen Wozniak.
1977: Apple introduced theApple II; capable of displaying text and graphics in color, the machine enjoyed phenomenal success. 1981:IBMunveiled its“Personal Computer,”which used Microsoft’s DOS (disk operating system).
1984: Apple introduced the 1stMacintosh.The easy-to-use Macintosh came with a proprietary operating system and was the 1 st popular computer to have a GUI (graphical user interface) and a mouse.
1990: Microsoft releasedWindows 3.0, the 1st workable version of its own GUI.
1991:Linuxwas invented for the personal computer by Helsinki University student Linus Torvalds and made available for free.
1996: ThePalm Pilot,the 1st widely successful handheld computer and personal information manager, arrived.
2001: Apple introduced theUnix-based operating system OSXfor theMacintosh.
2002: The total number ofpersonal computers(PCs), including desktop and laptop machines of all types, shipped by manufacturers since 1975 reached 1 billion.
2005:Appleannounced it would start usingIntel microprocessorsin its Macintosh computers beginning in 2006. The Macintosh traditionally used microprocessors of a different design than the chips made by Intel and other companies that were found in the more than 90% of PCs running Microsoft Windows.
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