Each week Ross Rubin contributes Switched On, a column about consumer technology.
Kerberos, the hound from Hades that lent its name to an MIT-developed network authentication protocol, is often visualized as having three heads. But if dogs can have multiple heads, why can't other technology species? Many of the features in Lion have impact for different kinds of users, and the value users see in them may well depend on which face they tend to view.
The new user. Lion represents the biggest user interface change to the company's
