stands for Scania On-board Power System . However, in the context of tuning and advanced diagnostics, the term is often used interchangeably with the parameter sets stored within the SDS (Scania Driver System) or the specific configuration files for the Engine Control Unit (EMS) and Vehicle Control Unit (VEC).

Technicians often use these parameters to troubleshoot or adapt the vehicle to different environmental regulations.

The SOPS file is not just about the engine; it heavily influences the Opticruise automated manual transmission (AMT). The parameter list here dictates the "personality" of the gear shifts.