Computer History

Alanna Castora 2nd period

10 events1939- George Stibitz develops the complex number calculator- a digital

foundation for computers.1963- Douglas Englebart invents and patens the first computer mouse.1971- Email was invented by Ray Tomlinson1976- Apple computers was founded by Steve Wozniak and Steve

Jobs.1983- More than 10 million computers are in use in the U.S2007- Apple releases the Apple iphone to the public2008- Apple releases the latest line of the Apple IMAC computers.2009- Microsoft releases windows 72009- Apple introduces the ipad.2011- Steve Jobs resigns as Apple CEO due to health problems.

measurements• RAM- a memory device in which information can be accessed in

any order• Nibble- a small byte• Byte- a sequence of bytes• Kibibyte- a unit of information equal to 1024 bytes.• Kilobyte- a unit of information equal to 1000 bytes• Megabyte- a unit of information equal to 1000 kilobytes• Terabyte- a unit of information equal to 1000 gigabytes• Petabyte- a unit of information equal to 1000 terabytes • Sector- the minimum track length that can be assigned to store

information.

First PC• ENIC (Electronic Numerical Integrator and Computer)

was the first true all-purpose electronic computer. Unveiled in 1946 in a blaze of publicity, it was a monstrous 30-ton machine, as big as two semis and filled with enough vacuum tubes (19,000), switches (6,000) and blinking lights to require an army of attendants. Capable of adding 5,000 numbers in a second.

First laptop• The IBM 5100 is the first portable computer,

which was released on September 1975. The computer weighed 55 pounds and had a five inch CRT display, tape drive, processor, and 64KB of RAM. (Random Access Memory)

• The first truly portable computer or laptop is considered to be the Osborne I, which was released on April 1981. The Osborne I was developed by Adam Osborne and weighed 24 pounds, had a 5-inch display, 64 KB of memory, two 5 1/4" floppy drives, and a modem.

Computer viruses worms and Trojan horses.

• A computer virus is a small software program that spreads from one computer to another computer and that interferes with computer operation. It could corrupt or delete data on a computer and even delete everything on the hard disk.

• They are mostly spread by attachments in e-mail messages. Computer viruses can be disguised as attachments of funny images, greeting cards, or audio and video files. They are also spread by downloads on the internet. They can hide in pirated software or in any other file programs that you may download.

Top 5 companies• HP : HP (Hewlett-Packard) is a leading American multinational

computer system manufacture in the world.• Acer : Acer ranks among the world's top five branded PC

vendors • Dell : Dell is a American multinational information technology

corporation. Thic company provides technology solutions, services and support

• Lenovo: Lenovo is a Chinese-based multinational computer technology corporation.

• Toshiba : Toshiba is a Japanese multinational company. Toshiba is a manufacturer and suppliers of all kinds of electrical products including laptops, notebooks and more.

Computers in the future…

• I think that computers in the future will have HD and 3D pictures. Instead of a keyboard it could either be touch screen or it will have voice command. Also I have a feeling that computers/laptops will be getting smaller and smaller that they will be able to fit in your palm kind of exactly like the I phones..