There are many types of systems software, but two types of systems software are central to every computer system today: an operating system and a complier.

As servers run different types of software and do not function in the same manner, there isn't a simple method for creating custom error pages that will work with every system.

Simulation and comparison studies of different peak and valley time price policies and different response types of users are carried out by simulation software VENSIM special for system dynamics.