A system is a set of processes that use resources and produce output.

A software application or a computer program is a type of software that can be used by a human or another type of intelligent agent. Applications are used by a computer to perform a specific task. They can also be used by a person to write a computer program.

When you install an application, it doesn't automatically start. You need to start it manually. You may need to do this if you are running a background service.

A software installation also doesn't automatically start.

If you're running a background service, you need to start it manually.