A byte is a term for a unit of measurement on a computer. If you own a computer, then it's likely that it holds at least a byte of memory.
Byte might refer to a unit of information or of storage space on a computer. Many computer operations involve a certain amount of bytes working per second or per minute. The word byte is related to another computer term, a bit, which is an even smaller piece of information; eight bits form one byte. The related words megabyte and gigabyte both have a whole lot of bytes — and even more bits.
