On the new-message notification of information systems

People get messages from several information channels provided by available communication technologies. Notification systems are installed to make sure that there is no missed important message. The problem is how to set the systems such that we do not get annoyed by them. Over 40 social communication systems found on the Internet are examined to list new message notification system. This paper classifies those systems and uses the classification as the basis of conducting a survey to confirm which ones are the most utilized by the users.