Do videoconferencing programs enable users to talk to and see each other?
Videoconferencing programs enable users to talk to and see each other, don't they?
What enables users to talk to and see each other?
Who do videoconferencing programs enable to talk to and see each other?
What do videoconferencing programs enable users to do?
Videoconferencing programs or special equipment enable users to talk to and see each other?
What programs enable users to talk to and see each other?
Who do videoconferencing programs enable users to talk to and see?
What do videoconferencing programs do?