Appeal 2007-2127
Reexamination Control No. 90/006,621
other. These time slices are very short, making the two threads appear
to run simultaneously.
The difference between sequential and concurrent (multithreaded)
programs is illustrated by Figure 1.1 in Advanced Programmer's Guide to
OS/2, page 5:
Note that the instructions execute sequentially in sequential program on the
left, but execute concurrently (in parallel) in a multithreaded program. This
difference is described in LaFore, Peter Norton's Inside OS/2, page 136:
When a program calls a function, control is transferred from the
calling program to the function; the calling program then stops
running until the function returns control to it. Starting a thread on the
other hand, creates another, different thread of control: both the
calling program and the thread it creates continue to run.
Another illustration of multithreading (concurrent execution of
multiple threads), multitasking of processes (concurrent execution of
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