  However, computer technologies can obscure the causal connections between a person’s actions and the eventual consequences. Tracing the sequence of events that led to a computer-related catastrophic incident, such as a plane crash, usually leads in many directions, as such incidents are seldom the result of a single error or mishap. Technological accidents are commonly the product of an accumulation of mistakes, misunderstanding or negligent behavior of various individuals involved in the development, use and maintenance of computer systems, including designers, engineers, technicians, regulators, managers, users, manufacturers, sellers, resellers and even policy makers. 