Events Affect Programs

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 Software Product. Programming Errors are also categorized as Events. 

We can say that a Computer System empowers a user to observe the result of Events. Computer Software is indeed helpful in recording the occurrence of an Event. Some Events are helpful while others are not.

Occurrence of an Event, is followed by processing of the Event. Software may be said to be responsible for processing of the Event. 

Processing of an Event produces  results. These results  may be available with the Software that processed the Event. It may happen that the result of a Event is felt and captured by Computer Hardware. 

Two most important points regarding an Event:

( A ) Event has origin

( B ) Event produces effect 

When an Event has happened, the future course of action can be decided by the Computer.