What Makes a Task Evolve into a Core Task?
Core tasks change more rapidly than user needs, since core tasks will change when new skills are learned by the user. Until around 1995, the core tasks of most mobile phones were making calls and receiving calls. After 1995, sending and receiving messages became core tasks for an increasing number of users. Despite the fact that the first mobile phones with Internet access and e-mail support were launched in the mid-1990s, browsing the Internet and writing/receiving e-mails did not become core tasks until much later (2005 or later).
Anecdote
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