Inter-Sheet V1.06 (1986)(Computer Concepts)
Inter-Sheet V1.06c (1986)(Computer Concepts)
Inter-Sheet V1.06 (1986)(Computer Concepts)[a]
Inter-Sheet V1.02 (1985)(Computer Concepts)
Inter-Sheet V1.03 (1985)(Computer Concepts)
Inter-Sheet V0.47 (1985)(Computer Concepts)