| A | B |
| Hardware | The physical components of the computer system. |
| Software | The programs or instructions that tell the computer what to do. |
| CPU | The brain of the computer or central processing unit. |
| ROM | The permanent memory that is built in your computer. This is read only. |
| RAM | The computer's working memory, sometimes called random-accessed memory. |
| Megabyte | Approximately a million bytes. |
| Gigabyte | Approximately a billion bytes (or 1,000 megabytes). |
| Input Device | The hardware that is used to pass information into the computer. |
| Output Device | The hardware that receives and dislplays information coming from the computer. |
| Monitor | A video or computer display device. |
| Compact Disc | A disc on which a laser has digitally recorded information such as audio, video, or computer data. |
| Hard Disk | A fixed, large-capacity magnetic storage medium for computer data (permanent memory inside the case). |
| Floppy Disk | This removeable storage device holds the least amount of data. |
| Motherboard | The main circuit board in the computer. |
| Bit | Short for binary digit. Made up of 1s and 0s. |
| Byte | A group of 8 or more bits. |