Deltiology (from Greek, deltion, diminutive of, deltos, "writing tablet, letter"; and, -logia)'s the study and collection of postcards. Compared to philately, the identification of a postcard's place and time of production can often be an impossible task because postcards, unlike stamps, are produced in a decentralised, unregulated manner. For this reason, some collectors choose to limit their acquisitions to cards by specific artists and publishers, or by time and location. Identification The… (More on Deltiology)