Collaborative software
 
Also referred to as groupware or workgroup support systems, collaborative software is designed to help people involved in a common task achieve their goals. Collaborative software is the basis for computer supported cooperative work. Such software systems as email, calendaring, text chat, wiki, and bookmarking belong to this category. It has been suggested that Metcalfe's law � the more people who use something, the more valuable it becomes � applies to such software.