Software engineering is a field of study related to the design and development of computer programs.

This software is shareware, so there will be a charge after the trial period.

This freeware is very convenient, and anyone can download it for free.

Your computer may be infected with spyware.

My computer got infected with malware.

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.

Do you understand the necessity of this project?

He sneaked into the school through the back gate.