aquatic ecosystem service function

automatic switching service

BPSS Basic Packet – Switching Service

digital telephone switching service

earthquake service function

ec ological service function

eco-environment service function

Ecological service function

ecology service function

economic value of ecosystem service function

eco-service function

Ecosystem service function

FSN Function Service Network

function service domain

host service function

international packet switching service

mobile service switching center

mobile-service switching center(MSC)

Multi-Service switching