post card definition by American Heritage Dictionary
- A commercially printed card with space on one side for an address and a postage stamp, used for sending a short message through the mail.
- See postal card.
post card - Computer Definition
(Power On Self Test card) A diagnostic board that is plugged into a PC's peripheral bus in order to display the BIOS's POST codes on a built-in readout. The last POST code displayed before the system locks up identifies the problem area. POST codes are different for each BIOS vendor (but, of course!). See POST code.