Assembly Langguage?

Question:What does it mean to discribe a computer as a 486 machine?
and what is the size of a segment in the memory?

Answers:
a 486 machine means it has an intel 486 CPU

a segment is a different size depending on if you are running in 'real' or protected mode. if 'real' mode then it is always 2^16 bytes which is 64KB if in protected mode then it can be of variable length