From: "der Mouse":
Specifically, what I have that's a mystery (/
represents a line break):
MCM2016HN70 / HID8625
CY7C409A-25PC / USA9225 91714
GAL16V8A / 15LP / L218D16
MC14034B / CP QQ8318
I found data sheets for three of those and a description of the fourth at:
http://www.datasheetarchive.com/
Vince