I should like to express particular thanks to the following people, without whom this book would have been impossible:
Brian Groombridge, who advised the Independent Television Authority to give me the Fellowship which enabled me to begin work on the book.
The IBA (as it had now become) for having been so patient and tolerant while the book was being written.
Arthur Arnold, of Bradford College, who supervised the work.
Bradford College for having given us the use of their equipment.
Ken Sparne, for having provided the technical information, as well as helping to develop the work.
The Bradford school-leavers who helped to invent the video games, gave us material, and created Spies at Work.
The other members of the video team ...