The computer: a definition.

From: Bob Shannon <bshannon_at_tiac.net>
Date: Fri Nov 21 16:26:24 2003

So what is a computer versus a caluclator, or a programmable controller?

Actually this is very simple, until you disagree with the definition and
insert religion...

A computer is a programmable computing system that can run pre-prepared
'software'.

A masked programmed microprocessor ~probably~ is not a computer (the
STAMP is clearly
an exception here).

A programmable calculator generally is ~not~ a computer, although
advanced ones with
mass storage and off-the shelf applications programs clearly IS a computer.

So is the fuel injection processor chip in your car a computer? Clearly
not.

How about a HP-41? Clearly this meets the above definition, as it has
applications programs
available.

Ok, what about a HP-33? Hmm, probably a programmable calculator, by the
above definition.

What about a PLC (programmable logic controller)? Clearly not a
computer, no software as
such, and its not primarily a computational device, its really just a
fancy state machine.

While any definition will leave some grey areas, this definition seems a
bit clearer than most.
Received on Fri Nov 21 2003 - 16:26:24 GMT