HP’s Memory Spot is a self-contained storage device with a processor and transmitter that sticks to photos, documents or cards.

It can be stuck onto menus, ads, travel brochures or photos, for exmaple. Wave a reader over it, and the spot will serve a video or audio recording of the subject of the picture to a nearby computer or cell phone.

Unlike RFID chips, the Memory Spot chips can be erased and rewritten and have larger capacity. Prototype chips now hold between 256 kilobits and 4 megabits of flash memory.