...
First off, it was founded by some guy named Gonville in 1348 and then it fell into a financial crisis and was saved by some guy named Caius. All you need to know is that it is called just Caius which is pronounced "Keys." The stereotype is that Caius will have a lot of Medics.
Things to do before/when you come
...
Once you are online, you just need to make sure you dont go over 500 megs a day or else you risk getting your connection turned off. The Janet website http://www.cam.ac.uk/localusersonly/cs/netdiv/usage/janet/item/byhost/00086/ will help you track your usage as they post the top 20 users.
Sports
Caius is known for its Rowers. We have a Boat house that is far from the college. It is where all the other boat houses are. If you become a rower you will have access to the weight room there which is the closest thing to gym the college owns. There is also no university gym. Caius also has a sports field and squash courts just south of Havey court on Barton Road. There are various college teams for different sports like frisbee, rugby, and netball. The list is quite long actually.