The digital cameras available at the Lab use two kinds of removable memory cards to store pictures. They also have a ridge along the edge opposite the holes. Smart media cards are about the same size, but much thinner. Both types of cards are available in a variety of memory capacities. Compact Flash come in 4 Mb to 256 Mb.
Manufacturers plan to offer increased capacities for both types in the future.
A 64 Mb card can hold anywhere from 32 highest quality, full size JPEG images when used in the Nikon Coolpix 990 and about 45 high quality, full size images when used in the Olympus C 2500.