The Proteus Professional package also comes with a PCB design program. The Proteus Professional package's capacity to mimic the functioning of programmable devices, such as microcontrollers, microprocessors, DSPs, etc., is one of its distinguishing features. The package is a system for simulating circuits that are based on the electronic component models used in PSpice. A software program for the computer-aided design of electrical circuits is called Proteus 8 Professional.