| A | B |
|---|
| Internal Hard Disk | This is inside all computers and is very fast. |
| Jaz Drives | These are good for backing up data and has around 2 gigabytes of memory. |
| Diskettes | These normally have 1.44 megabytes of memory. |
| RAM | Any data stored here is lost when you switch off the computer. |
| Video Graphics Memory | Screen pictures are stored here. |
| CD-ROM | This disk has around 650 megabytes and is read-only. |
| Zip Drives | They are good for backing up data and have between 100 and 250 megabytes. |
| ROM | A special memory chip inside your computer, which is read-only. |
| External hard disks | The same as Internal disks, but connected to the computer by cable. |
| Flash BIOS | This is the same as ROM-BIOS, but can be upgraded. |
| DVD Drives | These are used for videos and can have up to 17 gigabytes. |
| ROM BIOS | This chip checks your computer is working properly. |
