Dunbar's number - Wikipedia, the free encyclopedia
Dunbar's number is the supposed cognitive limit to the number of individuals with whom any one person can maintain stable social relationships: the kind of relationships that go with knowing who each person is and how each person relates socially to every other person.[1] Proponents assert that group sizes larger than this generally require more restricted rules, laws, and enforced policies and regulations to maintain a stable cohesion.
No precise value has been proposed for Dunbar's number, but a commonly cited approximate figure is 150.
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Freemium - Wikipedia, the free encyclopedia
Freemium is a business model which works by offering basic services for free, while charging a premium for advanced or special features. The word freemium is a portmanteau created by combining the two aspects of the business model: free and premium.[1] The business model has gained popularity with Web 2.0 companies.[2]
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Notation: * = Private bookmark and comment|… = Clipping [?] | … = Public highlight [?]
