Eight bits are grouped together to form one byte, additional one start and one stop bit.

The basic unit of information.
Definition: The smallest unit of information in the storage on a computer. Eight bits are grouped together to form one byte, additional start and stop bit.
Larger units are
kilobyte (kB) = 1 000 bytes (computer storage 1024 bytes)
megabyte (MB) = 1 000 kB (computer storage 1024 kB)

See also Bit Range, Binary System, Decimation, Digitization, Sampling Rate and Picture Archiving and Communication System.

[Binary Numeral System] Numerical system based on two different states, usually represented by the two symbols 0 and 1. Information storage and processing in modern computers is based on this system. Here the smallest unit is a bit.

See Bit, Byte.