The Lenovo APSs Sensor Application Interface (sometimes referred to as Lenovo Sensor Driver or Lenovo Active Protection System (APS)) is a software component that allows Lenovo laptops to interface with sensors built into the device, typically used to detect motion and protect the hard drive in case of a drop or sudden movement.

The APS system works by using a built-in accelerometer or other motion sensors to detect sudden movements or shocks, and if the system detects such an event, it can lock the hard drive's read/write head to prevent damage to the disk. This can help protect sensitive data and the hardware of the laptop.