Hi Group:
I'm late to this thread, but if it hasn't been mentioned already, I recall
that both Voyager I and Voyager II space probes were 4004 based in their
control/housekeeping units.
I see from the JPL pages that regular communications with Voyager have
just recently ceased, and that they are well beyond Pluto and above the
plane of the solar system, next system to be reached in about 20000 years.
Kevin
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Kevin McQuiggin VE7ZD
mcquiggi(a)sfu.ca