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RAM, ROM, CPU

1. ROM

   • ROM is short for Read Only Memory.
   • ROM does not require power to maintain its contents, and is often used to save instructions that enable the computer's operating system to communicate with other hardware.
   • It is also computer hardware that stores programs and data that cannot be added to, modified or deleted.

2. RAM

   • RAM stands for Random Access Memory.
   • RAM is the most common type of memory in a computer and other devices, such as printers.

3. CPU

   • CPU stands for Central Processing Unit.
   • The CPU is the brains of the computer where most of the calculations take place.
   • Sometimes it is just called the Processing Unit.