(1) (
Distributed 
APp)  See 
dApp.
(2) (
Directory 
Access 
Protocol)  A protocol used to gain access to an X.500 directory listing.  See 
LDAP.  See also 
DAAP.
(3) (
Digital 
Audio 
Player)  See 
digital music player.
(4) See 
digital audio processor.