1. Teleconferencing
   Teleconference
   A teleconference or teleseminar is the live exchange and mass articulation of information among several persons and machines remote from one another but linked by a telecommunications system...
   
    supported by one or more computer
   Computer
   A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem...
   
   s.
2. An arrangement in which access, by multiple users, to a common database
   Database
   A database is an organized collection of data for one or more purposes, usually in digital form. The data are typically organized to model relevant aspects of reality , in a way that supports processes requiring this information...
   
    is mediated by a controlling computer
   Computer
   A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem...
   
   .
3. The interconnection
   Interconnection
   In telecommunications, interconnection is the physical linking of a carrier's network with equipment or facilities not belonging to that network...
   
    of two or more computers working in a distributed manner on a common application process. Instant messaging
   Instant messaging
   Instant Messaging is a form of real-time direct text-based chatting communication in push mode between two or more people using personal computers or other devices, along with shared clients. The user's text is conveyed over a network, such as the Internet...
   
    and chat
   Online chat
   Online chat may refer to any kind of communication over the Internet, that offers an instantaneous transmission of text-based messages from sender to receiver, hence the delay for visual access to the sent message shall not hamper the flow of communications in any of the directions...
   
    systems are multicast
   Multicast
   In computer networking, multicast is the delivery of a message or information to a group of destination computers simultaneously in a single transmission from the source creating copies automatically in other network elements, such as routers, only when the topology of the network requires...
   
   ing approaches for computer conferencing.

See also

• Data conferencing
  Data conferencing
  Data conferencing refers to a communication session among two or more participants sharing computer data in real time. Interaction and presentation devices such as a screen, keyboard, mouse, camera, etc. can be shared or be able to control each other computer...
  
  
• DiffServ
  Differentiated services
  Differentiated Services or DiffServ is a computer networking architecture that specifies a simple, scalable and coarse-grained mechanism for classifying and managing network traffic and providing Quality of Service on modern IP networks...
  
  
• Predictive dialers
• Web conferencing
  Web conferencing
  Web conferencing refers to a service that allows conferencing events to be shared with remote locations. Most vendors also provide either a recorded copy of an event, or a means for a subscriber to record an event. The service allows information to be shared simultaneously, across geographically...
  
  
• Webinar