The CPU endianness is the byte and bit order in which it interprets multi-byte integers from on-chip registers, local bus, in-line cache, memory and so on. Little endian CPUs include Intel and DEC.

The biggest number you can make with a byte is 255, which in binary is 11111111, because it’s 128+64+32+16+8+4+2+1. You can also represent more complex information with bytes than you can with bits.

NESOS gives 8-bit system a GUI desktop, 8 tiny files, ... PPU), giving his virtual NES cartridge the same kind of storage that battery-backed games had, and shuttling each file, byte by byte, ...