System X (telephony)
System X was the name of the UK's first national digital telephone exchange system.
Read more about System X (telephony): System X Units, Replacement System
Famous quotes containing the word system:
“We find ourselves under the government of a system of political institutions, conducing more essentially to the ends of civil and religious liberty, than any of which the history of former times tells us.”
—Abraham Lincoln (1809–1865)