Tags: Genre, Music Genre, Topical Concept.
A modern notification system is a combination of software and hardware that provides a means of delivering a message to a set of recipients. For example a notification system can send an e-mail when an article has been changed in Wikipedia. The complexity of the notification system is often dependent on the types of messages that must be sent. An e-mail noting when a page has been changed in Wikipedia is adequate for such a straightforward task.