Terminology

• Client: A program that establishes connections to send requests
• Server: A program that accepts connections to serve clients' requests
• Group: A logical collection of on-line clients
  • Browse on the same set of documents
  • Synchronous navigation behavior
• Master: A client that acts as a group leader
  • by instructors, moderators, leaders, or peer-tutors
• Slave: A client that acts as a passive group participant
  • by learners, followers, or onlookers