1. Computer Storage

2. What is Primary Storage? ● Primary storage is computer memory that is directly accessible to the CPU of a computer without the use of the computer's input/output channels. ● Primary storage is used to store data that is likely to be in active use.

3. What is ROM? ● Read-only memory (ROM) is a class of storage media used in computers. ● Data stored in ROM cannot be modified. ● ROM is a non-volatile storage. Data remains unchanged even after switching off the computer.

4. What is RAM? ● Random access memory (RAM) is a type of data storage used in computers. ● Data stored in RAM can be modified. ● RAM is a volatile storage. Data will be lost after switching off the computer.

5. What is Secondary Storage? ● Secondary storage is computer memory that is not directly accessible to the CPU of a computer, requiring the use of a computer's input/output channels. ● It is used to store data that is NOT in active use. ● It is usually slower than primary storage, but it always has higher storage capacity. ● It is non-volatile. Data remains unchanged even after switching off the computer.

6. Secondary Storage Hard Disk ● Data can be read or write ● Speed of disk rotation usually 7200 rpm ● Data capacity: 80GB, 160GB, 250GB, 300GB

7. Secondary Storage CDDVD

8. Secondary Storage USB Flash Drives ● They are flash memory data storage devices integrated with a USB interface. ● They are typically small, lightweight, removable, and rewritable. ● Data capacity: 512MB, 1GB, 2GB, 4GB, 8GB, etc.

9. Secondary Storage Memory Cards ● Data can be read or write ● Data capacity: 512MB, 1GB, 2GB, 4GB, etc.