ARPANET, LISTSERV, and bulletin board services (BBS).
Companies are using social media as a way to learn about potential employees' personalities and behavior.
The main types of social networking services contain category places (such as former school-year or classmates), means to connect with friends (usually with self-description pages), and a recommendation system linked to trust.
One can categorize social-network services into three types:.
There have been attempts to standardize these services to avoid the need to duplicate entries of friends and interests (see the FOAF standard).
A study reveals that India recorded world's largest growth in terms of social media users in 2013.