When you start trying to talk to people about Security topics you may come to find that not everyone has a clear understanding what different terminology actually means. I don't think it is their fault really. We as a culture tend to under-explain topics to outsiders. For ease of explaining something to a non-technical person we will often overload a term (like Virus), or switch to an improper term (Like Trojan) that they are more likely to know...even if they don't understand what it means.
To combat that I think it is a good idea to get a running list of terms I have had to explain or clarify to people. These are my own explanations, meant to capture the unique qualities of each type of Tool or Technique.
