+* [Inessential AFS](http://stuff.mit.edu/afs/sipb.mit.edu/project/doc/afs/html/afs-new.html) ([DVI](http://stuff.mit.edu/afs/sipb/project/doc/current/iAFS.dvi))([PDF](http://stuff.mit.edu/afs/sipb/project/doc/current/iAFS.pdf))([PS](http://stuff.mit.edu/afs/sipb/project/doc/current/iAFS.ps))
+A guide to AFS (Andrew File System) - the system used to store your files on Athena.
+
+* [Inessential LaTeX (PDF)](http://stuff.mit.edu/sipb/ilatex) ([DVI](http://stuff.mit.edu/afs/sipb/project/doc/current/iLaTeX.dvi)) ([HTML, but somewhat dated](http://stuff.mit.edu/afs/sipb.mit.edu/project/www/latex/guide/guide.html)) <br />
+A very helpful guide to LaTeX, a typesetting program commonly used for doing PSets, writing papers, theses, books, etc.
+
+* [Inessential MATLAB](http://stuff.mit.edu/afs/sipb/project/www/matlab/imatlab/imatlab.html) ([DVI](http://stuff.mit.edu/afs/sipb/project/doc/imatlab/imatlab.dvi)) ([PDF](http://stuff.mit.edu/afs/sipb/project/doc/current/imatlab.pdf)) <br />
+A guide to using MATLAB on Athena.
+
+* [Inessential Zephyr](http://stuff.mit.edu/afs/sipb/project/doc/izephyr/html/izephyr.html) ([DVI](http://stuff.mit.edu/afs/sipb/project/doc/izephyr/izephyr.dvi))([PDF](http://stuff.mit.edu/afs/sipb/project/doc/izephyr/izephyr.pdf)) <br />
+A guide to using the MIT instant-messenging system, Zephyr.
+
+
+