Here are entered works both on cards sold by post offices with stamps already printed on them, usually mailable at rates lower than those for letters in envelopes, as well as on commercially printed cards, usually having a picture printed on one side, to which a stamp must be affixed for mailing.
Here are entered works on the transmission of pictures by telegraph or telephone wires, or by wireless telegraphy. Works on the photography of objects at a distance are entered under Telephotography.
