DAAR: Dynamic Automatic Alternative Routing
DAB: Data Acquisition Board

DAB: Digital Audio Broadcasting
DAB: Dynamic Address Book
DAB: Dynamically Allocatable Bandwidth
DABCE: Deactivation of Automatic Bridging Call Exclusion
DABE: Deny All But Emergency
DABM: Dual Access Buffer Memory
DABR: Data Address Breakpoint Register
DAC: Data Access Card
DAC: Datafield Access Conditions

DAC: Digital to Analog Converter
DAC: Directory Access Command
DAC: Discretionary Access Control
DAC: Dual Attachment Concentrator
DACC: Digital Access Cross-Connect

DACC: Directory Assistance Call Completion

DACCS: Digital Access Cross-Connect System
DACD: Digital Automatic Call Distributor
DACD: Directory Access Control Domain
DACE: Data Administration Center Equipment
DACIA: Dual Asynchronous Communication Interface Adaptor
DACL: Discretionary Access-Control List
DACRM: Data Communication Recovery Manager
DACS: Digital Access and Crossconnect System
DACS: Digital Access and Cross-Connect System
DACS: Digital Access Crossconnect System
DACWAC: DARCW Active/Inactive Status
DACWNL: Distinctive Alerting/Call Waiting Number List
DAD: Datapac Adviser
DAD: Desktop Application Director
DAD: Destination Address Display
DAD: Draft ADdendum
DAdC: Divert AdC
DAdm: Dial Administration
DADS: Directory Assistance Database Service
DAE: Data Access Evolution
DAE: Digital Audio Extraction
DAF: Data Administration Forum
DAF: Decrement All Frame