Once upon a time, Henry Yen <henry@AegisInfoSys.com> said:
A few (dozen) years ago, I was treated to a interesting demonstration where a coworker poured an oily fluid containing tiny metallic flakes on a patch of tape. The "bits" on the tape could be clearly seen by the naked eye, and could be decoded (ever so slowly!) using a magnifying glass.
Dad has a little magnifying glass above a tray of metallic particles with a slot below that. He could pull a tape through the slot, tap the device, and the particles would line up with the bits. Of course, he also still has his NASA-issued slide rule still in his desk at work. :-) -- Chris Adams <cmadams@hiwaay.net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble.