Palm OS is a mobile operating system developed by Palm, Inc. in the 1990s. It was designed for handheld devices, such as personal digital assistants (PDAs) and smartphones. Known for its user-friendly interface, it allowed users to manage contacts, calendars, and tasks efficiently. The operating system supported various applications, enabling users to customize their devices. Palm OS became popular for its simplicity and functionality, influencing later mobile operating systems. Although it has largely been replaced by more modern platforms, its legacy continues to impact mobile technology today.