M  A  T  H 
2  1  B 
The Mathematica lab is available. You can download it here [lab.nb]. You can preview a PDF version of the lab here. This lab has some new stuff like an "autotune" filter, image and movie manipulation, picture morphing, Markov music and poem generation. We have a 1 hour Mathematica workshop on Thursday, April 23, from 78 PM in Hall D, for those of you who have not yet seen Mathematica or need a refresher and a short walkthrough the assignment. 
MathematicaHarvard has a Mathematica site license. You can get it here and request a password, using the Harvard Site License Number L24822405.

MatlabMatlab is a CAS which is strong in linear algebra. Matlab is available as a student version. Here are some of the above commands in Matlab.
 
MapleMaple is a CAS comparable with Mathematica or Matlab. Here are the same commands in the Maple dialect.

MaximaMaxima is an open source CAS originally developed by the DOE. While having less features than the commercial CAS, it is GPL'd and free software: you can see the code.(echelon(A) is here an upper triangular matrix);
