Audio-visual communications has had a rapid advancement with it's respective technologies including sound, video, lighting, display and projection systems and is evident in every sector of society such as these:

• Business
• Education
• Government
• Healthcare
• Retail environments

The application of audio-visual systems are also found in:

• Online communications such as webcasting
• Collaborative conferencing presentation rooms
• Auditoriums and lecture halls
• Command and control centers

Videoconferencing uses telecommunications of audio and video to bring people at different sites together for a meeting. This can be as simple as a conversation between two people in private offices (point-to-point) or involve several sites (multi-point) with more than one person in large rooms at different sites.

Besides the audio and visual transmission of meeting activities, videoconferencing can be used to share documents and computer-displayed information, which are transmitted via a digital network (either ISDN or Internet Protocol).