A person who uses computers to gain unauthorized access to data.

A person with advanced computer knowledge who uses his or her skills to illegally access computer systems or networks, often for criminal purposes.

 It means to happen, to occur, or to occur. It suggests an event, moment, or situation that took place in the past, leaving its mark on the fabric of time, whether by chance, intention, or fate. 

Is the set of physical, tangible components of a computer system, such as the keyboard, monitor, hard drive, RAM, and motherboard.