The present era has witnessed a rapid technological advancement, which has shaped our social connection into a new dimension. Online social networks are gaining acceptance and popularity among masses. PCs and mobile devices are used to connect with each other. Availability of online social networks on remote devices, such as cell phones, has made it even more pervasively. A large population of internet users today is actively participating in online social networks (e.g., Facebook, Myspace, Twitter, Blogger). The percentage of members is growing higher each year. Online social networks are a specific type of Virtual Organizations, called informal VOs. This paper focuses on users and resources gathered and provided by online social networks. It presents online social networks as informal VOs and develops a generic pattern of user and its special type, which we call SUBJECT. It identifies the roles served by users as Subjects in online social networks and it reveals how users can be "consumed" as a resource in an informal VO.
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