Information Representation

Bit

Smallest unit of information a computer can store. 1 or 0.

Code

Association of sequence of bits with information.

To make sure everyone interprets the code in the same way, standards such as ISO, IEEE are created. Different standards are defined for different data types.

Common standards

ASCII

Uses 7 bits for a code. Unique combination for per English character. Includes both printable and unprintable characters.

Unicode

Uses 32 bits for a code. Designed as the superset of ASCII.