user group (UG)
A user group (UG) is a group of people with the same or similar interests.
Ininformation technology, many user groups have formed that have specific interests in a network concept, telecommunication device, operating system or application programs and that pursue their further development, standardization and improved market penetration. User groups can have anywhere from a few members to several thousand members. Their members can be individuals and corporate representatives. They can be active regionally, nationally, or internationally, pushing their ideas and comments via the Internet or at meetings.
There is an infinite variety of such user groups, of which Bluetooth 's Special Interest Group( SIG) is to be mentioned as an example.