"Cyber criminals have taken advantage of the proliferation of quick response (QR) codes on posters and marketing material by putting their own malicious stickers over the top of legitimate ones." I did wonder how long this would take.

"52 cards, each printed with a unique identifier, are replaced in the subject's view by the individual shots that make up a movie scene. The cards can be stacked, dealt, arranged in their original order or re-composed in different configurations, creating spreads of time."

Generated barcode stickers, to bring four-letter words up at the tills. "The cash register scanner will read a four letter text (have, take, give, want, lose, need) from the barcode instead of a price and in effect poetically disrupt the purchase."

Hypothetical: "When the bird flies about, the seed triggers the CCTV / webcam network in a city based on its proximity to the camera. The images are then sent to the person (his PDA) who fed the bird creating a story about the bird and the city."

"The child gets a butterfly net with an RFID tag in it and has to hunt for placards with pictures of insects on them."

Buy a bus ticket online, get an image of a barcode SMS'd to your phone, and swipe that image at a barcode reader when you board.

RFID chips in the Vatican library. "If a book is missing, or in the wrong place, the computer signals the fact with an alarm sound."

"To get good at reading, you have to practice. Do a barcode at least once a day."

A site that allowed people to print out barcode labels, to stick over those of more expensive products. It was shut down with legal threats, last year.

A club in Spain is offering RFID implants in place of VIP member cards.

Pictures and animations, including a Javascript clock.

A reader that lifts (MIDI-style?) birdsong from barcode labels that you can stick into any bird book.

"A semacode is a small symbol that encodes a standard, web-oriented URL. The URL is embedded into a two-dimensional barcode along with error correction information."