Spyware, Trojan

I have heard the term spyware and Trojan used for different things.

I think that spyware is when a person can see the files on you computer but cant cause much harm to them.

Trojan’s are a programs that look like one thing but are actually another.

I am not sure about most of this so correct me if I am wrong. Also sorry is this was posted in a different place.

http://infosecuritymag.techtarget.co...art406,00.html

This is a link which IMHO gives a good explanation of various types of malware, along with a description of how the lines are getting blurred.

spyware = tracking software used by companies to profile the users

trojans = remote access software used by scriptkiddies to gain access to your machine

Ok thanks guys.