context: Ideas for combining the functionality of a cell phone and a personal digital assistant (PC) appeared almost immediately after the first pocket personal computers appeared in the early 1990s. The first such attempt is considered to be the IBM Simon phone, first introduced to the public as a concept on November 23, 1992 by IBM [2]. In 1994, this unit was put on sale by an American mobile operator. The cost of the device was $ 899 with a contract and a little more than 1,000 without it. In addition to telephone functions, the device included the functions of an organizer, could send and receive faxes, allowed to work with e-mail, and also contained several games. There were no control keys; all actions were performed using the touch screen. Due to the large size and weight (more than 1 kg), the device did not receive significant distribution.
question: When did the first smartphone in the world appear?
answers.text: 1994