This all assumes it is a TTL and not an ECL or even
and analog chip, such as an opamp.
Or a resistor network, diode network, transistor array, programmed PROM, microcontroller,
etc, etc, etc.
As a total aside, on some HP boards there is a 16 pin DIL package with the part number
1260-0339.
Any ideas what that chip is?
-tony