Operating environments differ in whether the most-significant or least-significant byte is ordered first when storing numeric data. Ordering the most significant byte first is called big-endian (BE), and ordering the least significant byte first is called small-endian (SE).
You may need to specify the byte order in the Master File if you are reading data from a different operating environment.
Specifies that the most significant byte is ordered first. Hardware using this order includes IBM zSeries and POWER.
Specifies that the least significant byte is ordered first, also called reverse byte. Hardware using this order includes Intel x86, x86-64, and DEC Alpha.