... quasi-multitasking^1.1

At the present time Apple are preparing a new operating system called NextStep or Rhapsody or Mac OS Server X which is based on BSD 4.4 Unix running on a Mach micro-kernel and will run old MacIntosh software under emulation

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... system^1.2

In Manitoba, Canada, the telephone system is also called MTS. The telephone system is probably more advanced than the original MTS, and certainly faster!

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... OS^1.3

This is not really true of course - if they did not wait for the OS, then they would not be able to continue executing at all!

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...heap^1.4

This is described more fully in the next chapter

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... keyboard^1.5

Actually only one keyboard is needed because it is only possible to write one thing at a time, but it is possible to read two things at the same time.

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... filesystem^4.1

Experts might say that this has purely to do with filesystem semantics (see chapter 5) but given the filesystem, this becomes a synchronization problem.

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... model^6.1

PC users often think that a server has to be a special kind of computer. This true on old PC networks because they run an operating system which cannot run several processes. Only a single task is required to run a server, but since PC networks before NT could not multitask, a whole machine was required to do this job. On modern systems, any machine acn be a server and a client simultaneously.

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... requests^6.2

Note: this is not true multi-threading since all of the processes are heavyweight processes.

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