name "PDP 11 assembler" dir as end name "PDP 11 backend" dir cg end name "PDP 11 target optimizer" dir top end name "PDP 11 interpreter" system pdp* dir int end name "PDP 11 C libraries" system pdp* dir libcc end name "PDP 11 EM library" system pdp* dir libem end name "PDP 11 systemcall library" system pdp* dir libsys end name "PDP 11 Pascal library" system pdp* dir libpc end name "PDP 11 Basic library" system pdp* dir libbc end