$1 \text{ Byte} = \mathbf{8} \text{ bits}$. A byte is the standard addressable unit of computer memory. Multiples: 1 KB = 1024 bytes, 1 MB = $1024^2$ bytes, 1 GB = $1024^3$ bytes. The 8-bit byte became standard with early microprocessors and remains the fundamental unit of digital storage.