5. Assassination gun

6. Cigarette case weapon

7. Hidden knives

8. Fairbairn-Sykes fighting knife

9. Keychain guns

10. Silenced firearms

11. Poison-pellet weapons

12. Single-shot pistol

13. The 'Stinger'

14. Suicide weapons

16. Dead-drop bolt

17. Dead-drop spike

18. Bugs

19. Bug detectors

20. Corona

21. Cray Supercomputer

22. Hollow coin concealment

23. Fiber- scope

24. Hidden still cameras

25. Hidden video cameras

26. Infrared telephone

27. Invisible ink

28. Hidden audio recorders

29. Microdots

30. Minox camera

31. One-time pad

32. U-2 Spy Plane

33. SR-71