ETM

The eTM (e-Card Transfer Machine) is a Machine in the Post Office that can upload a temporary Program to the e-Reader that can transfer the data from scanned e-Cards to the Gamecube and send mail to the player.

Counterparts
In Mable and Able's Shop you can also scan design cards or upload the program. (There arn't passwords on Design Cards, So you have to scan them in.)

When Making a Town Tune you can Press R to Scan K.K. Town Tune Cards or upload the Program (There isn't a Password on Town Tune Cards so you'll have to scan them in.)

The Message Board Also lets you enter in Village Cards Or upload the program. There are Passwords on the Villager cards That Players without an e-Reader can give to Tom Nook.