| A | B |
|---|
| Sequential Access | Reading a set of records in the same order as they were originally stored. |
| CD-RW | Can be written to or erased over and over again. |
| Floppy disks , hard disks, CDs , DVDs and USB flash rom | Examples of backing storage media :) |
| Backing Storage | Used as a permanent storage or programs and data when the computer is switched off. |
| Formatting | Produces invisible tracks and sectors on the surface on the disk. |
| A Disk Drive | Used for storing information on a disk. |
| USB Flash Drives | Solid state device and the media is called Falsh ROM. |
| Hardware | Physical parts of a computer system |
| Write protected / Read only | Can't write anything to a disk |
| Disks | Gives you direct access because the data in a disk can not be read in any order, not just the order in which it was written |
| Compressed | To allow more data to fit on a single tape. |
| CD-R | Can be written to only until it is full. Can not be erased or overwritten. |
| CD-ROM | Read Only compact disc. Capacity of 650 - 700Mb |
| Random or Direct access | Data can be located quickly wherever it is stored on the disc. |
