Year 7 revision 7.2

Year 7 revision 7.2

1. Solid State

   • Solid state devices use non-volatile random access memory (RAM) to store data indefinitely
     • RAM
       • Random Access Memory (RAM) is a fast temporary type of memory in which programs, applications and date are stored

2. Magnetic

   • Principally used for backup of important files from the hard disk and for the long term storage and archiving of data

3. Optical

   • Optical devices use a laser to scan the surface of a spinning disk made from metal and plastic

4. CPU

   • The purpose of CPU is to process data. The CPU is where processes such as calculating, sorting and searching take place

5. Processing

   • Carrying out a set of instructions

6. Hardware

   • The physical parts of a computer system, eg a graphics card, hard drive disk or CD drive
   • Storage
     • A storage device is a piece of computer equipment which can be used to store data
     • Memory
       • The part of a computer that stores data

7. Input

   • An input device is any piece of computer hardware used to provide data to a computer system
   • Output
     • An output device is any piece of computer hardware used to communicate the results of data that has been processed

8. Peripherals

   • A peripheral device is defined as a computer device, such as a keyboard or printer, that is not part of the essential computer

9. Embedded

   • Embedded computers are used in car engines, spacecraft and MP3 players
     • They are dedicated systems that are designed for a fixed purpose