A memory to add to this discussion...? After moving to California in 1957 I quickly arranged to make a trek down to see the Hewlett-Packard plant on Page Mill Road in Palo Alto? -- the one with all of the skylights in the roof as seen in catalogs of the era.? When I asked to see some of the instruments like their parallel-plate slotted line, one of the engineers took me through the laboratory.? I remember clearly that it was populated with Tektronix scopes at that time.? It looked like a great place to work.