I'll have a look... hard to tell what there is at
the moment. Certainly
 a lot of -11 stuff and peripherals, along with some -8 bits (which
 implies that DEC made an effort to go back and transfer some of their -8
 paper docs to fiche at some point).  Supposedly we've got everything
 that was ever released on fiche by DEC, but I doubt there's any record
 of exactly what that is anywhere... 
Well, the complete "VAX Maintenence Library" takes one blue fiche box.  I
know you can find PDP-8, PDP10, PDP-11, VAX, and early Alpha hardware
documentation on Fiche, as well as XXDP, VMS Source listings, and who knows
what other software related fiche.  I'm guessing there is a good chance that
some of the other HW families made it to fiche as well.
Keep in mind how long Microfiche has been around.  The PDP-8 stuff was most
likely put on fiche while the systems were current.
                        Zane