2.  In 1970, Marcian Hoff, and engineer, invented the microprocessor, an entire CPU on a single chip. The replacement of several larger components by one microprocessor made possible the fourth generation of computers.

3.  They had …  Input Devices  Memory  CPU (Central Processing Unit)  Output Devices

4.  Computers have two types of memory contained on chips..ROM and RAM!!

5.  ROM- Read only memory, enables the computer to complete simple jobs such as placing a character on the screen or checking he keyboard to see if any keys have been pressed.

6.  RAM- Random Access Memory, is a temporary memory where data and instructions can be stored.

7.  The first computer was invented in 1936 by a man named Konrad Zuse. The computer was called a Z1 Computer.

8.  It came from Grace Murray Hopper’s report of finding an actual bug-a moth-inside a computer.!

9.  The internet began in 1969. The internet started as something called ARPA Net, and it was created by the US military as a world wide communications network.

10.  The Babbage Analytical Engine is a massive brass, steam-powered, general purpose mechanical computer.

11.  Hollerith’s method was used in 1890 census. He invented it because like if you had a railway ticket, he wanted to have the age, state of residence, gender, and other other information on the card.

12.  The army needed a computer for calculating artillery- firing tables, the setting used for different weapons under varied conditions for target accuracy. It was built in the University of Pennsylvania.

13.  A program is an organized list of instructions that, when executed, causes the computer to behave in a predetermined manner. Without programs, computers are useless.

14.  By replacing bulky and unreliable vacuum tubes with transistors, computers could now perform the same functions, using less power and space.!

15.  In 1975, Ed Roberts invented the Microcomputer. A microcomputer is a computer with a microprocessor as its central processing unit.

16.  A binary system is a representation system, used in computers, with only two digits, 0 and 1.

17.  http://www.pbs.org/wgbh/aso/databan k/entries/dt45en.html http://www.pbs.org/wgbh/aso/databan k/entries/dt45en.html  Google  Google Images  Wikipedia  A Guide to Microsoft Office XP Professional