And all of those applications, without exception, require data be input from disk or tape or keyboard or mouse or network devices, and results be output to disk, tape or screen devices.

And for many (most?) of those applications, the only way to process the vast volumes of data involved, is to spread the load across multiple processors. In order for that to happen, those processors need to talk to each other.

Heck, even on a single processor machine, the cpu has to talk to the RAM, and to the processor, RAM is just another external device driven by IO lines. It may be concealed by vitualised memory, but there is real memory (chip devices) and real interupts underlying that abstraction. Every program uses IO in some form.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
The "good enough" maybe good enough for the now, and perfection maybe unobtainable, but that should not preclude us from striving for perfection, when time, circumstance or desire allow.

In reply to Re^5: Mathematics eq CompSci by BrowserUk
in thread Mathematics eq CompSci by kiat

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