An accident is an undesirable and unexpected event that causes material (damage to patrimony) and financial damages and occurs so unintentionally. They may be caused by humans, animals and natural causes.
• Accidents can be caused by the nature as hurricanes and earthquake, animals and insects and humans and it can be from stopping a service for a few seconds to shutting down a data center for hours, causing losses of millions of dollars.
A physical example includes unwanted collisions and falls, as the fall of a laptop from the table or fire in the datacenter caused by a short circuit.
Non-physical examples can be when somebody trip over the power cable of a server.