I was just reading a bit on TTL while looking for
something else.
In 1965 a 7400 gate was $20 and Candy bars 5 cents.
Probably not 7400 series (earliest 7400 series I have are from late 1968).
There were a number of logic families that were out in the mid-1960s. Yes,
in 1965 I can believe $20 per chip!
And then, ten years later, 19 cents per chip...
William Donzelli
aw288(a)osfn.org