IBM Simon - Wikipedia, the free encyclopedia

Besides a mobile phone, the major applications were a calendar, address book, world clock, calculator, note pad, e-mail, and games. It had no physical buttons to dial with. Instead customers used a touchscreen to select phone numbers with a finger or create facsimiles and memos with an optional stylus. Text was entered with either a unique "predictive" on-screen keyboard or QWERTY keyboard. The Simon had an optional PCMCIA memory card.