1. SYSTEM UNIT Amy Pierce Comm. 165 MWF 800-850

2. System unit components are housed within the system unit or system cabinet Desktop Notebook PDA (personal digital assistant)

3. ELECTRONIC REPESENTATION Data and instructions are represented electronically with a two-state binary system or numbers A byte consists of eight bits and represents one character.

4. BINARY CODING SCHEMES ASCII EBCDIC Unicode

5. SYSTEM BOARD Also known as the main board or mother board Connects all system components a flat circuit board covered with sockets and other electronic parts, including a variety of chips

6. MICROPROCESSOR The “brains” or the system unit Control Unit Arithmetic-logic unit Microprocessor chips –Word complex instruction set computer chips reduced instruction set computer chips –Smart cards

7. MEMORY RAM –flash RAM –virtual memory –memory cache ROM CMOS

8. SYSTEM CLOCK The system clock controls the speed of computer operations. It is measured in gigahertz.

9. EXPANSION SLOTS AND CARDS Network adapter cards modem cards television boards PC cards

10. BUS LINES ISA PCI AGP USB

11. PORTS AND CABLES Allow external devices to connect to the system unit Ports - connection sockets on the outside of the system unit –types: serial, parallel, USB, and HPSB Cables - used to connect external devices to the unit via ports

12. Thank You