PDP-11s always used 8-bit bytes, you're probably thinking of the PDP-8. I don't remember what the popular sizes for the PDP-10 were. A 36-bit machine, none of

PDP-11s always used 8-bit bytes, you're probably thinking of the PDP-8. I don't remember what the popular sizes for the PDP-10 were. A 36-bit machine, none of the choices were really great. (I know that CLU on the PDP-10 used 36 bits).