I'm not the most computer literate of people so humour me. What is the score with this logging on thing where you have to copy what appears in a box. I have come accross it a few times now. Usually they are jumbled up or distorted and I find myself pondering things like "Is that supposed to be a zero or an o? That might be a Q?" etc etc. Of course this strange thing now happens with my arrse log in. Can somebody satisfy my curiosity and explain (In simple terms that a technochimp like me can understand) what this is for and what it does? Thankyou.