FTP service

3G Data Service Testing

Application service data unit

ATM data service unit

automatic data service center

B-ISDN Broadband – Integrated Service Data Network

Broad band Integrated Service Data Network (B-ISDN)

Broadband Data Service

chemical data service

connectionless broadband data service

DATA SERVICE

data service command processor

data service connecting

Data Service Control

data service decoder

data service for highway-crossing warning

data service language

Data Service Layer

data service manager