Let's make a list of 101 Items That Could Be Credit Card Sized
in the 40th millennium.
1. Credit/Throne Card
2. Identity Card
3. Door Access Card (electronic or code type)
4. Door Access (physical key-like access)
5. Multi-Tool (Bottle Opener, Screw Driver, Chisel, Compass,
can opener, Tweezers, diamond-tip etcher, tree-saw wire, etc.
6. Garrote.
7. Priviledge or Authority Card (memberships, buildings, lab access, passport)
8. Battery Backup
9. Data Card
10. Two Ounce Thin Flask
11. Folding Knife
12. Micro Vox (mini cell phone)
13. Beeper (Locator)
14. Lens (Micro-Binocs, magnifier)
15. micro-light or laser pointer
16. micro data slate (recording, diary, journal)
17. circuit writer (metal line painter)
18. language translator (written or spoken)
19. vehicle lock-out or starter
20. collapsible sunshade
21. pocket med-scanner (or personal med. diag gadget)
22. paper money clip
23. business card (contact or guild info) {paper, give-away}
24. business "card" (contact or guild info) {electronic, data-exchange}
25. micro thin ration bar
26. digi-cam
27. photo, souvenir, or memory displayer
28. music, radio or entertainment player
29. mini stencil or marking kit
30. e-reader (kindle) (entertainment, news, current events, alerts)
31. e-reader (pad) (data, tech readouts, ingredients, formulas, directions, guidebook))
32. slicer/hacker/phreaking/intrusion kit
33. measuring device (laser, sonic, line, etc)
34. drone or servitor controller.
35. vehicle remote control
36. teleport homer (loc. beacon)
37. deadman switch or penal device.
38. brush, comb or other cosmetic device
39. gewgaw or children's entertainment, a distraction.
40. micro radar viewer (xray specs)
41. O2 filter (fold-out breather plugs)
42. signalling mirror/laser reflector
43. collapsible tools or chairs (memory plastics)
44. rad/poison/biochem exposure or detector
45. jammer or silence field
46. collapsible rope
47 chronometer
don't say stupid stuff like a star cruiser, okay?
doesn't have to be sci-fi stuff, could be mundane things I've omitted.
surely there's more, what say you?