(1) (
Digital
Data
Storage) See
DAT.
(2) (
Data
Dictionary
System) See
QuickBuild and
OpenDDS.
(3) (
Dataphone
Digital
Service) A private line digital service from AT&T with data rates from 2.4 to 56 Kbps.
(4) (
Digital
Data
Service) A private line digital service from carriers other than AT&T.