Program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes.
Spyware
Any software that covertly gathers user information through the user's Internet connection without his or her knowledge, usually for advertising purposes.
MAC
MAC Address, A hardware identification number that uniquely identifies your computer on the network.
O/S
Operating System, Software that allows the computer to run applications. Example: Windows 98, Windows XP, OSX, Linux
Hardware
The Physical components of your computer. Video Card, Processor etc.
Software
The compiled computer code that allows your computer to complete tasks.