The LaTeX (a document-preparing language) mathematical symbols and their corresponding keywords, all at a glance!

LaTeX in 129 minutes!: A "Not so Short" Introduction to LaTeX (It's 129 pages, one minute per page!)

Getting started with LaTeX: An introductory guide to LaTeX (Download it as a compressed TEX or DVI file)

Teach Yourself the Latin Language: Don't get surprised, I know Latin is a dead language, but I found it so much interesting! If you intend to learn Latin, I suggest you this quick guide (I have combined the HTML files for different chapters into a single PDF document so that you can print it more easily), if you don't, again I suggest you to download the guide and read the very first pages; I promise you won't get back to work before you have studied the whole guide, believe me! This guide is the best starting point for you, each chapter takes you at most half an hour, and can be studied on your way to home. If you need, however, contact me to put some Latin/English and English/Latin dictionaries in the page. Many can be found online over the internet for free. I suggest you to download Dictionary 2000, IDP companion (both are multi-lingual dictionaries), or Words. (Words is the best Latin/English dictionary I have ever seen, and it is distributed cross-platform; i.e. for MS-DOS/Windows/Linux/FreeBSD/Mac OS X)

A quick guide to Matlab: Two or three hours would be enough to become a Matlab guru!

Introduction to Perl 5 programming: Learn Perl 5 as fast as possible by example.