In light of past discusion about Self-Taught Programmers vs CS-Educated Programmers:
What are must read CS books (or other resources) that help you in your daily work? (so I don't mean code complete or head first design patterns)
I'm a Self-taught programmer and I think I'm missing some knowledge of algoritmes and discrete math. but perhaps there are other great subjects/books (compilers etc)
EDIT: Thanks everybody for the great suggestions
EDIT 2: The list so far (unsorted)
http://sharetext.org/YUE
First is Structure and Interpretation of Computer Programs[1], which you can read online, and the associated course at MIT, which is 6.001[2]
Second is the famous 'Dragon Book', Compilers: Principals, Techniques and Tools[3] and the associated course which is 6.035[4]
Extras would be the Python book 'How to think like a Computer Scientist'[5]. MIT course 6.00[6] uses the book as a reference, and the courseware is again available online.
Other than that - the usual suspects on learning C (K&R), UNIX (TAOUP[7]), the bash shell along with grep, sed, awk, more algorithms(CLRS[8]), functional programming and machine learning. Take your time, it takes years to build the relevant experience and knowledge and you are never done.
I love the MIT courses. Work and learn at your own rate. I feel that it is important to implement all the code yourself even if it looks easy in a lecture - there are little things you pick up as you write algorithms out.
Even though I had worked through SICP I still watched all the lectures again and implemented all the examples with benchmarks and unit tests. I usually set aside one day on the weekend to work on study, and usually an extra evening or two mid-week to read papers and books. Once you get into the routine it is great.
It might be the best approach to set yourself a timetable and weekly schedule, just like in UNI (ie. every Saturday plus Tuesday and Thursday nights) and work through the MIT courseware and associated books in order (6.00, 6.001, 6.035). The more advanced MIT courseware is an excellent bonus.
[1] http://xrl.us/sicp
[2] http://xrl.us/6001
[3] http://xrl.us/dragonbook
[4] http://xrl.us/6035
[5] http://xrl.us/thinkcs
[6] http://xrl.us/6000
[7] http://xrl.us/artunix
[8] http://xrl.us/clrs