Computer systems

Computer systems

1. Ram is volatile

   • Holds the data of the operating system and programs that are currently running for access by the CPU
   • Volatile means that data is lost when the power is switched off

2. ROM is non-volatile

   • It holds the BIOS and the bootstrap loader to boot up the operating system
   • Non-volatile means it keeps the data even when the power is switched off

3. Input devices are needed to input data into a computer

   • Output devices are needed to show the result of processed data

4. There are 3 main types of storage

   • Magnetic
   • Solid state
   • Optical