P.D.Stephens Selected Publications "The IMP Language and Compiler", Computer Journal Vol 18, pp127-130(1975). (with N.Shelness and H.Whitfield) "EMAS Scheduling and Allocation Procedures in the resident Supervisor", Presented at I.R.I.A. Colloque International sur les Aspects Theoriques et Practiques des Systems d'Expoitation April 74. Chosen as one of the six best computing papers presented in France during 1974 and reprinted in Revue Francais d'Automatique, Informatique et Recherche Operationelle Vol B2, pp29-45(1975). "ALGOL(E) Language", International Computers Ltd. Technical Publication No 6855. (1976). (Editor and co-author) "EMAS2900 Concepts", ERCC (1980). "The EMAS2900 Operating System", I.U.C.C. Bulletin Vol 2 No 2, pp85-89 (1980). (with D.J.Rees and J.K.Yarwood) "The Evolution of the Operating System EMAS2900", Software Practice and Experience Vol 10, pp993-1008 (1980). (with D.J.Rees) "The Kernel of the EMAS2900 Operating System", Software Practice and Experience Vol 12, pp655-667, (1982). (with J.K.Yarwood) "Providing Multi-access to Distributed Array Processors", Software Practice and Experience, (submitted for publication)