An Event occurs when a Software Program is running. A Hardware Unit may cause an Event. An Event may be triggered by a piece of Software. Pressing action on the ENTER key of a connected keyboard is regarded as an Event. Keyboard generated Event originates from Computer Hardware ( Yes, the Keyboard is a part of Computer Hardware ). This Event is recognized by the Computer System. Computer Hardware may be the source of an Event. It may be the case that an Event caused by Hardware is handled by another piece of Hardware. In this case the piece of Hardware is the Event Handler. These days specialized Hardware is very much used. Specialized Hardware may be directed to take action on an Event that occurred. Programming mistakes are called as Errors. It is a mistake by a Programmer to perform an operation that is not allowed. When Error(s) occur, they are systematically reported to a Programmer. Errors are properly handled. Error Management is a part of Soft...