In flowchart material, postcard (or just card) is a finite*-accessible page (the 'post'~) or sheet/interface containing information that may also be marked.** individual ~~ Do not confuse with post (route).

Each postcard threaded on UUhistlegrass - as uuhistlegrass - features, at a minimum, the following identifiers: a title (header), body [illustrated (with text, stamps, holograms, and/or stickers) or void], and a date/postmark (metadata). (See stamp, sticker, thread, hologram. Compare stew, residue)