People in technical fields like computer science, IT, (or physics for that matter) very often adopt improper use of words for informal usage. It can make for interesting confusion at times. There are a number of reasons why this happens:
sometimes someone doesn't understand a thing and uses the word incorrectly and the incorrect usage catches on (internet and web are probably describe the same thing for most people, but technically they are different);
other times someone takes a word and uses it to express a more general idea.
There are other reasons, but all of them, I suspect are the same kinds of reasons that words change meanings in the rest of human discourse.

The words you have chosen clearly convey some kind of meaning. By themselves they might be a little ambiguous, but in context, I think the meaning is clear in most cases.