| A | B |
| Expansion Bus | The pathway of wires that connect athe cpu and the expansion boards. |
| Firmware | A program that is embedded in a silicon chip rather than stored on a floppy. |
| Footprint | The space that a motherboard or case occupies. |
| Chipset | The specialized IC's on the motherboard that allows the cpu, t work with memory or the expansion boards, also known as northbridge and southbridge. |
| AT | Advanced Technology Extended for factor thats named after the XT but after the Baby AT and ATX form factor. |
| ATX | Power connector, main connector for power. |
| Bus | Which data is transfered from one part of a computer to another. |
| Data Bus | The pathway of wires connecting the cpu and memory. |
| Form Factor | Specification and size of a motherboard or powersupply. |
| EISA | Extended Industry Standard Architecture |
| EEPROM | Electrically Erasable Read-Only Memory - a type of ROM |
| CNR | Communication and Networking Riser, small expansion card having audio, modem, or networking functions. |
| COM 2 | Second Serial port either 9 pin or 25-pin found on older PCs. |
| COM1 | Common 9-pin male serial port found on most PCs. |
| I/O | a software or hardware device designed to send info |
| Baby AT | Version of the AT form factor reducing the size of the motherboard and allowing cases to be smaller. |
| LED | Lighlt Edmitting Diode |
| AMR | Audio Modern Riser small expansion card that can have audio modern or networking cabpabilities. |
| CMOS Battery | Battery that holds the data entered in the configuration program. |
| Daughter Board | Commonly connected directly to the motherboard and gives the computer an added feature. |