I used Audacity on my eMac to record a friend playing guitar.
I did my usual lengthy emails and some short emails to professors. I bought a copy of Linux for Dummies Quick Reference. I also got a copy of the Computers of Star Trek. I took back the Data Munging with Perl book and also the NAG library guide book that was almost 30 years old. I used the computers at school yesterday and used MATLAB for the first time to do some numerical analysis homework. I got 2 hours done on that course since Saturday morning and 3 hours done on law courses.