# What are the examples for stochastic processes in Electrical Engineering and Computer Science?

I wanted to find out what kind of different usages of stochastic processes theory in EE & CS are out there. For example, I find these kinds of usages interesting:

• using stochastic signal as carrier that is modulated by the information signal for communication
• using stochastic process analysis for improving photographed pictures after long exposition

It would be good if every example would be in separate answer, so it would be possible to up-vote those that are 'the best'. I would classify good example as one that:

• truly takes advantage of probability and statistics theory
• has greater 'usefulness' then other examples

Google's Pagerank algorithm is a stochastic approximation (through Markov's stationary state) of the proportion of visits received asymptotically by website $x_i$.