A miniature picture the size of the head of a pin. Microdots are shrunken pictures that can be transported underneath a postage stamp on a letter. The agent receiving the microdots has a microdot viewer that enlarges the picture so that it is readable. Microdots can also be hidden in-between the layers of a book binding and any where else that one can imagine. Microdot Viewer
A microdot is a text or image shrunk to prevent viewing by unintended recipients. A microdot is frequently shrunk to the size and shape of a typographical dot, such as a period or the tittle of a lowercase i or j. It is a technique of steganography.
The Microdot is a concept design by William Towns for a small, economical town car. The car was first shown in 1976 and was an evolution of his 1972 Minissima car.