1. computer 2. A computer is a machine that manipulates data according to a list of instructions. 3. The first devices that resemble modern computers date to the mid-20th century (1940-1945) 4. Early electronic computers were the size of a large room, consuming as much power. 5. Modern computers are based on integrated circuits and are billions of times more 6. Embedded computers are small, simple devices that are used to control other devices 7. A microcomputer is a computer that has a microprocessor chip as its CPU 8. THEY ARE CALLED PERSONAL COMPUTERS BECAUSE THEY ARE DESIGNED TO BE USED BY ONE PERSON AT A TIME 9. Personal computers are at school, or at a business. 10. Personal computers are come into two major varities, desktop computers and laptop computers. 11. Desktop computers are larger and not meant to be portable. 12. They usually sit in one place on a desk or table and are plugged into a wall outlet for power. 13. A separate keyboard and mouse allow the user to input data and commands. 14. Laptop or notebook computers are small and lightweight enough to be carried around with the user. 15. They run on battery power, but can also be plugged into a wall outlet 16. They typically have a built-in LCD display that folds down to protect the display when the computer is carried around 17. They also a feature a built-in keyboard and some kind of built-in pointing device 18. PDAS and palmtop computers is a handheld microcomputer that trades off power for small size and greater portability 19. They typically use a touch-sensitive LCD screen for both output and input 20. PDAS communicate with desktop computers and with each other either by cable connection, infrared (IR) beam, or radio waves 21. PDAS are normally used to keep track of appointment calendars, to-do lists, address books, and for taking notes 22. Palmtop or handheld PC is a very small microcomputer that also sacrifices power for small size and portability. .