[ianbishop]

I've always found APL really intriguing. A professor of mine told me about how one of his students used to be able to solve ACM competition problems incredibly fast by simply not having to type very much. There are some insane videos on youtube of people solving problems in APL [1].

But, you know - it's write once, read.. never again.

[1] http://www.youtube.com/watch?v=a9xAKttWgP4

[fusiongyro]

Check out J. There are a few inconsistencies in APL that are remedied in J, though you lose out on the "cool" non-ASCII operators.

http://jsoftware.com/

[silentbicycle]

It's not that hard to read, it's just dense.

I can read k, which is similarly dense, but limited to ASCII. You may need to read it a bit more slowly, like math, but it is readable. (I can't read Thai, either, but that doesn't make it unreadable.)

[spitfire]

Give Mathematica a shot. If you can read mathematics you can read Mathematica.