ActiveX

Is a framework for defining reusable software components that perform a particular function or a set of functions in Microsoft Windows.

Worm

A malware program that replicates itself in a computer.

Virus

It is a computer program that replicates itself in a computer and infects it.

Urban Legend

Is a form of modern folklore consisting of stories usually believed by their tellers to be true.

Trojan Horse

Is a destructive program that starts off as a application. It doesn't replicate itself but acts as a program that claims to rid your computer of viruses but actually lets them in.
 

Time Bomb

A malicious program that is programmed to "detonate" at a specific time and release a virus onto the computer system or network.

Teleconferencing

Is a live exchange of verbal information among a group of people in one place and one or more people in another place. Usually far distances from each other.