Write a simple routine (such as the addition of two integers) in
assembly language and also in a high-level language. Compare the
number of bytes required for each version.
Operating systems
An operating system, often described as DOS (disk operating system) is a
way of taking some of the burden from programmers and users of computers
by supplying a set of standard routines. Every program that makes use of a
computer will require routines to be written to accept input from the
keyboard, and also output to the screen and printer. Every program will
need to be able to make efficient use of the memory, and also the
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