A 
byte is eight bits, the size of one char. A kilobyte (KB) is 1024 bytes, while a megabyte (MB) is 1024 kilobytes, a gigabyte (GB) is 1024 megabytes, etc.
A byte is the minimum amount of memory allocatable. Even a bool is one byte (thus the benefits of BitVec[Clarify]).
- In
GoldSrc and 
Source, byte is a typedef for unsigned char, making its range 0-255.
