1. A process or running process refers to a set of instructions currently being processed by the computer processor. For example, in Windows you can see each of the processes running by opening the Processes tab in Task Manager. Windows Processes are Windows Services and background programs you normally don't see running on the computer. For example, a process may be a printer program that runs in the background and monitors the ink and other printer settings while the computer is running.
2. Process is also the act of manipulating, altering, or viewing data.
3. In general, process refers to a set of predetermined rules in place that must be followed.