1) In February 1946, J. Presper Eckert and John Mauchly unveiled, for the first time, an electronic computer to the world.

2) The invention of the Apple I in 1976 3) On January 3, 1980, Hewlett Packard introduces its

HP-85 (A microcomputer with 16kB of RAM and a 5-inch CRT display).

4) Disney releases the movie Tron on July 9, 1982, the first movie to use computer generated special effects

5) 1982: Microsoft establishes an additional headquarters in England to begin foreign sales efforts.

6) The game Tetris is first released in June 6, 1984. 7) 1990: Microsoft exceeds $1 billion in sales and

becomes the first company to do so8) Yahoo.com domain is registered on January 18, 1995 9) The first YouTube video entitled "Me at the zoo" is

uploaded April 23, 2005 10) Steve Jobs resigns as Apple's CEO due to health

reasons on August 24, 2011

Computer Timeline

1) 1946

10) 2011

2) 1976

3) 1980 6) 1984

7) 1990

4) 1982;

5) 1982

8) 1995

9) 2005

Random Access Memory (RAM) is the best known form of computer memory. RAM is considered "random access"

because you can access any memory cell directly if you know the row and

column that intersect at that cell.

•A bit (8 bits = one byte)1024 bytes = one kilobyte

•K = kilobyte

•Kb = kilobit

•MB = megabyte

•Mb = megabit

•MB/s = megabytes per second

•Mb/s = megabits per second

•Bps = bits per second

Henry Edward Roberts invented the first personal computer (PC). Dr Roberts was the founder of Micro Instrumentation and Telemetry Systems (MITS), originally set up to sell electronics kits to model rocket

hobbyists. The company went on to sell electronic

calculator kits, but was soon overshadowed by bigger firms.

In the mid-1970's, with the firm struggling with debt, Dr Roberts began to develop a

computer kit for hobbyists. The result was the Altair 8800, a machine operated by switches and with no display.

Designed in 1979 by a Briton, William Moggridge, for Grid Systems

Corporation, the Grid Compass was one fifth the weight of any model equivalent in performance and was used by NASA

on the space shuttle program in the early 1980's. A 340K byte bubble

memory lap-top computer with die-cast magnesium case and folding

electroluminescent graphics display screen.

Viruses - A virus is a small piece of software that piggybacks on real programs. For example, a virus might attach itself to a program such as a spreadsheet program. Each time the spreadsheet program runs, the virus runs, too, and it has the chance to reproduce (by attaching to other programs)

Worms - A worm is a small piece of software that uses computer networks and security holes to replicate itself. A copy of the worm scans the network for another machine that has a specific security hole. It copies itself to the new machine using the security hole, and then starts replicating from there, as well.

Trojan Horse - A destructive program that masquerades as a benign application. Unlike viruses, Trojan horses do not replicate themselves but they can be just as destructive. One of the most insidious types of Trojan horse is a program that claims to rid your computer of viruses but instead introduces viruses onto your computer.

IBM

Founded in 1891 by Thomas J. Watson

Apple

Founded by Steve Jobs in 1976

Dell

Dell was founded in 1984 by

Michael Dell

Toshiba

1875 by Hisashige Tanaka

HP

Bill Hewlett and Dave Packard founded HP (Hewlett-Packard) in

1939

•http://www.zerocut.com/tech/c_terms.html

•http://kb.iu.edu/data/ahty.html

•http://www.instablogsimages.com/images

•http://arstechnica.com/did-ibm-invent-the-personal-computer

•http://news.bbc.co.uk/2/hi/technology/8600493.stm

•http://www.howstuffworks.com/virus.htm

•http://www.nndb.com/company/700/000042574/

•http://www.apple.com/pr/bios/steve-jobs.html

•http://www.toshiba.co.jp/worldwide/about/history.html