What is a distributed system?
A distributed system is a collection of entities, each of which is autonomous and asynchronous, which can communicate through an unreliable communication medium.
What is the difference between distributed and parallel computing?
Distributed computing addresses computation distribution, while parallel computing focuses on tightly-coupled applications.
What is distributed computing?
Computing in relation to where the computation physically resides. Distributed algorithms, for example, are executed on multiple geographically spread CPUs.