revision computing

revision computing

1. binary

   • binary system Usually, the binary number system, i.e. the positional number system with base 2. This is the number system most commonly used in computers
   • binary numbers are only made up of 0 and 1s

2. character sets

   • A defined list of characters recognized by the computer hardware and software.
   • ASCII
     • 7 bites 127 characters
       • extended ACSII 8 billion and 255 characters
   • unicode
     • 16 bites
       • 65535 characters
         • extended unicode 32bites and 2billion characters

3. secondary storage

   • Image result for what is secondary storage Alternatively referred to as external memory, secondary memory, and auxiliary storage, a secondary storage device is a non-volatile device that holds data until it is deleted or overwritten.

4. cpu

   • The CPU (Central Processing Unit) is the part of a computer system that is commonly referred to as the "brains" of a computer. The CPU is also known as the processor or microprocessor.

5. RAM