Interpreting Memory Addresses

There are two different conventions for ordering the bytes within a word.
Little Endian (followed by DEC and Intel)
Big Endian (followed by IBM, Motorola and others)

Two different conventions for ordering bytes within a word.

When operating within one machine, the byte order is often unnoticeable - only programs that access the same locations as both words and bytes can notice the difference. However, byte order is a problem when exchanging data among machines with different ordering.