Norton Utilities 1990 Ver 5.0, Symantec. Ghost Surf Pro.

Computer Spacegames Vintage Usborne Programming Book BASIC Games for Micro

Computer Space Games And Weird Usborne Computer Book ZX Spectrum Commodore M14

Creepy Computer Games , Tyler & Oxlade , Usborne Computer Books, Acorn, ZX, CBM

Usborne Computer Programming Tricks and Skills , Acorn BBC CBM Spectrum ZX81

Computer Spy Games Usborne Computer Book ZX Spectrum Commodore Acorn CBM ZX81

Computer Spacegames Usborne Scholastic Red, ZX Spectrum Vic BBC TRS-80 Apple PET

Usborne Computer Spacegames Book, Hard Backed Spectrum Acorn CBM ZX81 1983