Devices that combined telephony and computing were conceptualized as early as 1973, and were offered for sale beginning in 1994. The term "smartphone", however, did not appear until 1997, when Ericsson described its GS 88 "Penelope" concept as a Smart Phone.
The distinction between smartphones and feature phones can be vague, and there is no official definition for what constitutes the difference between them. One of the most significant differences is that the advanced application programming interfaces (APIs) on smartphones for running third-party applications can allow those applications to have better integration with the phone's OS and hardware than is typical with feature phones. In comparison, feature phones more commonly run on proprietary firmware, with third-party software support through platforms such as Java ME orBREW. An additional complication is that the capabilities found in newer feature phones exceed those of older phones that had once been promoted as smartphones.
Some manufacturers and providers use the term "superphone" for their high end phones with unusually large screens and other expensive features.
With the advent of devices with larger screens, the term "phablet", a portmanteau of the words phone and tablet, had come into common usage by 2008.
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