Windows, Mac, iOS, Android, and Linux support this L5M15 practice exam. The desktop Advanced Negotiation (L5M15) practice test software is similar to the web-based L5M15 format as far as its features are concerned. But it works offline only on the Windows operating system. The offline L5M15 practice exam can be taken easily just by just installing the software on your Windows laptop or computer. All three Advanced Negotiation (L5M15) formats of Prep4pass are according to the latest content of the CIPS L5M15 examination.