X-MED
X-MED stands for Xerox Mobile Express Driver
X-Gt
X-Gt stands for Xbar Generator
X.435
X.435 stands for CCITT EDI Protocol
X.500
X.500 stands for CCITT Directory Services Protocol
X-SAMPA
X-SAMPA stands for Extended Sampa
X.400
X.400 stands for CCITT Message Handling Protocol
X/OPEN SAG
X/OPEN SAG stands for X/Open SQL Access Group
X.25
X.25 stands for CCITT Packet Switching Protocol
X/OPEN
X/OPEN stands for X/Open Company Ltd
X-WAV
X-WAV stands for Unix Sound Format