Any learning event where interaction is delayed over time. This allows learners to participate according to their schedule, and be geographically separate from the instructor. Could be in the form of a correspondence course or e-learning .
Interaction can take use various technologies like threaded discussion.
CBT can be delivered via CD-ROM, LAN or Internet. Creation is done by teams of people including instructional designers, and often has high development costs. Correspondence Course - A course completed from a distance using written correspondence for interaction and to submit assignments. The formal process of distance learning . This term has traditionally implied the higher education level.