APDU

What?

According to http://acronyms.thefreedictionary.com/APDU

Acronym Definition
APDU Application Protocol Data Units (OSI)
APDU Association of Public Data Users
APDU Advance Planning Document Update
APDU Armour Piercing Depleted Uranium (weapon)
APDU Analytical Process Development Unit
APDU Application Programming Data Unit (software)