17 Dec
2010
17 Dec
'10
11:20 p.m.
Wang Laboratories had house numbers that were put on their IC packages.
(http://oldcalculatormuseum.com/t-wangic.html). Some chips from vendors
other than TI had the original part number covered up (usually by a
white strip of paint), and an internal part number printed elsewhere on
the package. Not clear if this was done by Wang, by some reseller, or
perhaps by the original manufacturer. The parts with TI logos (mostly
7400-series TTL) actually had Wang part numbers put on them by TI, or at
least so it appears.
-Rick