Xshell - a general purpose expert system shell: Mack, A.J. Electronics Research Lab., Adelaide (Australia). Corp. Source Codes: 056162000; 410863 Sponsor: Department of Defence, Canberra (Australia). Report No.: ERL-0509-RE; DODA-AR-005–997 May 90 31p Languages: English Journal Announcement: GRAI9109 NTIS Prices: PC A03/MF A01 Country of Publication: Australia