BlackBerry Tablet OS is an operating system developed by BlackBerry Limited specifically for its tablet devices, such as the BlackBerry PlayBook. Launched in 2011, it is designed to provide a smooth and efficient user experience, featuring a touch-based interface and support for multitasking. The OS is built on a foundation of QNX, a real-time operating system known for its stability and security. It supports various applications, including web browsing and media playback, and integrates with BlackBerry smartphones for enhanced functionality, allowing users to access emails and notifications seamlessly.