I've got a standard from 1984 that references "AISC S326- Specification for the Design, Fabrication and Erection of Structural Steel for Buildings". So at some point, some of these things either had numbers, or people thought they did. Maybe that was someone's product code, too. But I notice on AISC's "out of print" list, they list product numbers, some in the S300 series, and show, for example, M015 for the 1st edition of LRFD Manual.
Nutte, you say "And to further confuse things, the specificaton has a number, while the manual has a different number." Is that 325-01 the specification number or the manual number?