Hey everyone. A few things to hopefully help you reduce some stress:
First off, as far as registration goes, do not panic if you can't register right now. The core classes will not fill up, and neither will Zoo Med. Deep breaths, it will be fine! Make sure you're enjoying your summer and doing as much relaxing as possible, you probably won't find much time for that come August!
Secondly, since computers just came up on your thread, I thought I'd give some guidance. You can get by with pretty much any computer you'd like to use. I'm not sure if they're still telling you that you need Windows 7 if you're bringing a PC, but everyone in my class with Windows 8 has had no problems at all. Quite a few students are starting to use the Microsoft Surface Pro "Tablets"(in quotes, since they're legit full-function computers); they all seem to like the keyboard & touchscreen functionality, and it makes everything super portable. If you're in the market for a new computer, I highly recommend you take a look at those.
Also, I would highly recommend using Microsoft OneNote to EVERYONE, whether you have a Mac or a PC. Most PCs bought in the past 4 years should already have it, and it's a free download for MacOS. The big feature that could possibly be life-saving, is that OneNote can back up all your notes to their cloud server, so you can access them on any computer/tablet/phone. You wouldn't believe the number of students in my class alone who have had their computers die, usually right before exams, that have been saved by this feature.