The present invention extends to methods, systems, computer program products, and data structures for presenting different types of electronic messages at a common interface. Electronic message items are stored in an item database along with other types of items, such as, for example, contact items,...http://www.google.com.tw/patents/US7194516?utm_source=gb-gplus-share專利 US7194516 - Accessing different types of electronic messages through a common messaging interface
