Earlier quoted context omitted.
Hewlett-Packard?
Does anyone know whether HP had anything like 20% time in its earlier days? I've never heard that they did, but now that you mention it it does seem like the kind of thing that HP might have done.
One (admittedly high-level) guy built a stereo amp -- http://www.hpmemory.org/news/barney_ampl/barney_page_00.htm -- and the company indulged him by allocating some surplus factory capacity to a limited production run.