There are currently 24 categories.
Awk is a very important Unix programming language for manipulating text very quickly. It's included in every Unix and Linux distribution and you should know it inside out. Here are my tutorials about it.
Articles about my and James Halliday's startup - Browserling - live interactive web-based cross-browser testing! (Earlier called StackVM, which brings virtual machines to the web.)
All kinds of programming and computer science cheat sheets - vt100/ansi cheat sheet, shell emacs editing mode cheat sheet, iptables cheat sheets and many many others.
I love computer science.
Using the hacker's approach one can develop cool software in a matter of hours without really going into details how it all works but using the right pieces and putting them together. Also a real hacker would be able to do the right things with the wrong tools.
Howto guides - howto download youtube videos, how to upload them, how to be a real hacker, how to become immortal, etc ;)
Ideas that I want to build at some time later.
Interviews with me.
Analysis of MIT's "Introduction to Algorithms" video lectures. Contains embedded videos with timestamped list of topics and scanned lecture notes.
Analysis of MIT's "Linear Algebra" course. Contains embedded videos with timestamped list of topics and scanned lecture notes.
A good computer scientist has to know mathematics.
Articles that don't fit in other categories. They include interviews and blogging related stuff.
Really funny and geeky songs I found in my mp3 collection.
My favorite programming books, software development books, coding books, physics books, chemistry books, mathematics books, and science books.
Here is a list of node.js modules you should know about. We use these at Browserling and Testling and it's great!
Perl is my favorite and one of the hackiest languages ever invented. I get things done with quickly. Here are some of tutorials that I wrote about it.
I love programming!
All the various projects that I have done, they include digpicz, reddit media, reddit river, and others.
Computer security is a field close to my heart.
Everything about the new catonmat website.
Tools - small programs that do great things. Actually this category is not very useful, I am going to merge it with some other category soon.
This category contains various articles on how to work in the Unix shell.
I love watching video lectures and tech talks. Here are some of my favorite videos.
I have collected hundreds of visual math proofs. In these articles I explain them and prove their correctness.