What does VOIP stand for?

What does VOIP mean?

VoIP	Voice over Internet Protocol Computing » Drivers
VOIP	Voice Over Internet Protocol Computing » Networking
VoIP	Voice Over Internet Protocol Computing » Hardware
VoIP	Voice over Internet Protocol Computing » Telecom
VOIP	Voice Over Internet Protocol Internet
VoIP	Voice over Internet Protocol Computing » Software
VOIP	Voice Over Internet Protocols Miscellaneous » Unclassified
VOIP	Voice Over Internet Packet Miscellaneous » Unclassified
VOIP	Voipvoice Over Internet Protocol Miscellaneous » Unclassified
VOIP	Voice Over Internet Provider Miscellaneous » Unclassified