Calendar events and calendar-driven application technique

Calendar interface for digital communications

Calendar item hierarchy for automatic specialization

Call center system where users and representatives conduct...

Call completion via instant communications client

Call optimization in meet-me conference calls

Cellular messaging alert method and system

Challenge response messaging solution

Challenge response systems

Chaperones in a distributed system

Chat clusters for a virtual world application

Chat distribution service system for alternatively...

Chat interface with haptic feedback functionality

Chat interface with haptic feedback functionality

Chat messaging channel redirection

Chat room communication network implementation enabling...

Chat sending method and chat system

Chat system allows user to select balloon form and...

Chat system and method for delivering additional information...

Chat system and record medium readable by chat system