| A | B |
| CPU | Central Processing Unit |
| MHz | Clock Speed |
| Motherboard | main circuit board |
| Expansion Slot | Opening for new circuit board |
| RAM | Random Access Memory |
| ROM | Read Only Memory |
| Hard Disk | Magnetic Disk |
| Bit | A Biniary Digit |
| Byte | A unit of storage for one character |
| Mega Byte | 1084567 bytes |
| SIMM | Single In-line Memory Module |
| DRAM | Dynamic RAM |
| SRAM | Static RAM |
| Volatile | Content lost at power off |
| VRAM | Video RAM |
| PROM | Programmable Read Only Memory |
| Serial Port | Interface used for comms |
| Peripheral Device | External device |
| Video Card | Enhances display capabilities |
| Sound Card | Enhances sound capabilities |