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What is a snapshot

  For you probably the question "What is a snapshot?" is very simple, but there are plenty of people still have no idea. That is why I would like to make it clear - what is a snapshot.
 Let's learn now about

The snapshot

 In computer systems, a snapshot is the state of a system at a particular point in time. The term was coined as an analogy to that in photography. It can refer to an actual copy of the state of a system or to a capability provided by certain systems._{http://en.wikipedia.org/wiki/Snapshot_%28computer_storage%29}
 Congratulations for your new knowledge about what is a snapshot!