Bit (Binary)
The basic unit of information in computing and digital communications. Consists of 0 or 1 only.
Nibble
Nibble contains 4 bits. There are sixteen possible values. It corresponds to a single hexadecimal digit.
Byte
Contains eight bits - the number of bits required to encode a single character of text.
Kilobyte
2^10 (or 1,000 bytes)
Megabyte
2^20 (or 1,000 kilobytes)
Gigabyte
2^30 (or 1,000 megabytes)
Terabyte
2^40 (or 1,000 gigabytes)
Kibibyte
2^10 (or 1,024 bytes)
Mebibyte
2^30 (or 1,024 kibibytes)