up, next.
Segments
A segment is a contiguous section of a program containing related
data or code, or a stack. Some operating systems use segments as the
primary unit of a program for swapping programs in and out of memory
and on these platforms it is important to keep code and data that are
usually accessed together in the same segment. For DOS, you don't
have to worry about this.
There are, as I mentioned above, three types of segments:
stack, data, and code.
up, next.