Lisp

A comparison between Scheme and Common Lisp--the author perfer scheme:)
To be fair enough, here is a comparison in favor of Common Lisp:)
An introductory article about Lisp: Features of Common Lisp. The next step will be comprehensive and advanced learning in this language.
Besides, via google searching, there are lots of comparison articles/ discussions and excellent introductions for both dialect languages. At last, I made up my mind: CL will be the next language after I conquer Clojure:)

ps. here is the Google Translate API. Furthermore, other APIs can be looked up in this Explorer.
p.ps. best paper awards list.

Update: A little bit digression, below is the digest of an interesting discussion about genius in Hacker News:
Genius is the act of solving a problem in a way no one has solved it before. It has nothing to do with winning a Nobel prize in physics or certain levels of schooling. It's about using human insight and initiative to find original solutions that matter.
Genius is actually the eventual public recognition of dozens (or hundreds) of failed attempts at solving a problem. Sometimes we fail in public, often we fail in private, but people who are doing creative work are constantly failing.
When the lizard brain kicks in and the resistance slows you down, the only correct response is to push back again and again and again with one failure after another. Sooner or later, the lizard will get bored and give up.

ps. sth about unix and bash file.
The basic bash file introduction could refer to here.
UNIX tips: Learn 10 good UNIX usage habits
UNIX tips: Learn 10 more good UNIX usage habits

pps. sth about Graphviz
1) First step is to install it and know the basic syntax of the command line;
2) Then, the 2nd step reading is also referred in the web page above;
Besides, "How to draw hash table" and some other complicated graphs are both good start points to learn its software and language.