1970: the newly formed Intel unveil the 1103 , the first dynamic
access memory chip
1971 : A team of IBM engineer led by Alan shugart invents the " floppy disk " enabling the data to be shared on differnet .
1972 : A ralph bear A german american Engineer, releases Magnavox Odyssey , the worl's home Game console, in the september 1972, according to the Computer Museum of America Months laters, entrepreneur Nolan Bushnell and engineer Al Alcorn with Atari relaease pong, the world's commercially successful video game.
1973: Robert Metcallfe, a member of the research staff for Xerox, devolps Ethernet for connecting Multiple computers and other Hardware.
1977: The commodore Personal Electronic Transactor ( PET) , is released onto the home computer market , featuring an MOS technology 8-bit 6502 microprocessor, which controls the screen, keyboard and cassette player , The Pet is especially successful in the education market , according to O ' Regan .
1975: The magazine cover of the january issue of "Popular Electronics" highlights the Altair 8080 as the " world' first minicomputer kit to rival commercial models. " After seeing the magazine isue tow " Computer geeks, " Paul Allen and Bill Gates , Offer to write seeeing the magazine issue , two, " computer geeks, " Paul Allen and Bill Gates , , offer to write software for The alair , using the new Basic language. On April 4 , after the success of this first endeavor, the two childhood friends forms their own software company mircrosoft.
1976 : steve Jobs and steve Wozniak co-found Apple computer on A prill Fool's DAy. they unviel Apple I , the first computer with a single-circuit board and RoM ( REad Only Memory ) .
according MIT.
1983: The Apple Lisa standing for " Local integrated Software Architecture " But also the name of steve Job's daughter , according to National Museum of American History (NMAH) , is the first personal computer to feature a GUI. The machine also includes a drop -down menu and icons. flip-form design and the very first to be sold as a " Laptop."
1984: The apple macintosh is announced to the world during a superbowl advertisement. the macintosh is launced with retail price of $ 2500 , according to NMAH.
1985: As a response to The Apple lisa 's GUI , microsoft releases windows in November 1985
the gardian reparted . Meanwhile , commodore announces The Amiga 1000.
1989: The Berners-Lee, a British researcher at the European Organization Nuclear Research (CERN), submits his proposal for what would become the world wide web. His paper details his ideas for Hyper Markup Language ( HTML), The building Blocks of the web.
1993:The pentium microprossor advances the graphic and music on PC.
1996: Sergy brin and larry page devolped the google search engine at Stanford university
1997: microsoft invest 150 $ million in apple which at time struggling the financially at that time.
The investment went on ongoing court case in which microsoft
1999: Wi-Fi , the abbreviated term for "wirelesss fidelity " is developed , intially covering a distance for up to 300 feet ( 91 meters ) Wired reported
21 century
2001 : Mac OS X , later renamed OS X then simply macOS, is released by apple as the successor to its standard Mac operating system . OS X goes through 16 different versions, each with "10" as its title , and the first nine iterations are nicknamed after big cats , with the first being codenamed "Cheetah" TechRadarreported .
2003: AMD's Athlon 64 , the first 64-bit processor for personal computers is released to customers.
2004. The Mozilla Corporation launches Mozilla Firefox 1.0 . The web browser is one of the first major challenges to internet Explorer, owned by Microsoft . During it first five years, firefox exceeded a billion downloads by users according to the web Design Museum.
2005; Google buys Andrion, A Linux-based mobile phone operation system.
2006: Google buys Andriond, Linux-based mobile phone operation system .
2006 : The Mac book Pro from Apple hits the shelves the Pro is the company's first intel based dual -core mobile computer .
2009: Microsoft launches windows 7 on July 22 . The new operating system features the ability to pin applocations to the taskbar, scatter windwos away by shaking another window .
Amazing calculators before computers
Abacus 2700 AC
Abacus 2700 ac
Abacus is a manual aid to calculating that consists of beads or Disks that can be moved up and down on a series of sticks or strings withing a usually wooden frame.
The abacus itself doesn't calculate, it's simply a device for helping a human being to calculate by remembering what has been counted . The modern Chinese abacus, Which is still widely used in China and other countries, date from about 1200 A.D.
It is possible that it derives from the earlier counting board is used around the Mediterranean as early as 300 B.C. An Aztec version a an abacus , Circa 900-1000
A.D, is made from Maize ( corn) threaded through strings mounted in a wooden frame.
Pascal calculator 1652
the Pascaline or Pascal calculator was invented by blaise pascal in 1652 to help his father .
a tax collector in his calculating labour .
Machine can add and subtract directly and multiply and divide directly .
Pascal created 50 prototypes before making this machine public 1952.
He made numerous revision of this machine.
Only nine machine survived in the time. Most of them are in Museum in Egypt.
Stepped Reckenor 1964
Stepped Reckenor was invented Gotfried Leibniz . It was the first Machine calculate all four arithmetic operation . it was the only machine which use cursor.
Therefore I have memory for storing operand.
Leibniz built two stepped recknor. one in 1694 and second in 1706 . The second one was forgotten at attic university of Gotfried Leibniz discovered 250 year later .
Arithmometer 1820
Arithmometer 1820 was patented by Thomas De Colmar in 18 50 and was first machine to to used in offices from 1850 1890. The Arithmometer was the first machine only used in production
The machine can perform addition subtraction directly and can perform long multiplication and division .
Comptometer 1887 and Comptograph 1889
Comptometer was the first machine calculator with keyboard.
The keyboard consist of 8 column of 9 keys. the Comptometer was very similar to Pascaline and can perform faster calculation due to its keyboard.
And it can perform long multiplication and division. Some Comptometer have keys for special purpose su ch as currency and weight.
Comptograph is improved version of Comptometer with printing mechanism.
Despite its improvement. it is very complicated to use and therefore slower .
Difference Engine 1822
Difference Engine was invented by charlies Babbage in 1822.
It would have been the first machine capable of calculating and holding 7 numbers with 31 digits each and automatically used results from previous operation as input.
it was designed to tabulate polynomial function.
the project was never completed and abandoned in 18 34.
Analytic Engine
after abandoning the Difference Engine . Babbage started to work on analytic engine. the Ancestor of modern computer. The computer has two separate input stream .
Three output results.
Processing unit and memory .
it was the first machine have programming set of instruction.
it was Lady Ada Love Lovelace .
Who wrote alogritham to compute Bernoulli numbers the first program ever created .
Hence earning her to be first computer programmer. Babbage was not able to complete analytic engine
due to inadequate funding .
9. Millionaire 1893
The millionaire was the first calculating machine .
that can perform direct multiplication unlike its predecessor .
where multiplication was performed as repeated addition .
the millionaire required only one turn of crack and handle to multipy and entered numbers by a multiply .