The term 'Palm Phone' can be summarized by the crossword solution 'Treo, ' which is a brand of smartphones developed by Palm, Inc. and released in 2002. The Treo was one of the first smartphones to combine the functions of a personal digital assistant (PDA) and a mobile phone. It was also one of the first devices to feature a full QWERTY keyboard. The Treo was popular among business users and was eventually replaced by the Palm Pre in 2009.