The ThinkPad Tablet Keyboard and Buttons (106109 Key) driver refers to the software that supports the functionality of a specific ThinkPad tablet or ThinkPad laptop with a detachable keyboard, particularly the buttons on the keyboard (e.g., function keys, special keys, volume control, etc.) and possibly the touchscreen interaction (in tablet mode).

The "106109 Key" part likely refers to a specific hardware model or configuration, particularly the type of keys or the number of keys (sometimes linked to specific hardware versions). These keys are often integrated into ThinkPad tablets or laptop docking stations, and this driver ensures that the keyboard's special keys and functions work correctly on Windows systems.