A Personal Digital Assistant (PDA) is a handheld device designed to help users manage their personal information and tasks. PDAs typically include features such as calendars, contact lists, note-taking capabilities, and task management tools. They can also connect to the internet and sync with other devices, making it easier to access information on the go. Originally popular in the late 1990s and early 2000s, PDAs have largely been replaced by smartphones, which combine the functions of a PDA with advanced communication features. Notable examples of early PDAs include the Palm Pilot and Apple Newton.