Methods, apparatus, and systems for on-line seminars

摘要

Methods, apparatus, and systems are provided for on-line seminars over a network. A client receives sets of program code that perform operations requested by a presenter. A stream is transmitted from a server to the client for the presentation. The server detects the operations requested by the presenter and pushes an event that indicates the requested operation into the stream. The client receives the event, selects a set of program codes based on information in the pushed event, and executes the selected set of program code in synchronization with the at least one stream.