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# TeX Resources

### The TeX program

TeX software is available from a number of sources:

LaTeX is an integral part of all "standard" TeX distributions, and AMS-LaTeX is included among the "required" LaTeX packages.

Extended TeX engines

• pdfTeX generates pdf output instead of dvi.
• XeTeX supports the direct use of system fonts.
• LuaTeX is based on Unicode and embeds Lua (a scripting language) and MetaPost to permit operations not easily accomplished with the basic TeX engine; v1.0 was released in late 2016 and is included in TeX Live 2017.

### Other TeX Resources

Other valuable resources for a TeX user

Package archives

• CTAN -- the Comprehensive TeX Archive Network, with locations around the world.
Use the CTAN search facility to look for the name of a file you need.
• TLContrib -- an archive of contributed packages which, for various reasons, cannot be distributed in TeX Live (not free according to FSF guidelines, not available on CTAN, intermediate release for testing, ...)

Why TeX?, a comparison of structured document input vs. WYSIWYG, by Allin Cottrell

Cross-platform TeX editors, a list compiled by the AMS

Detexify, a tool for identifying symbols from a hand-drawn image.

Frequently Asked Questions and other Q&A sites

LaTeX

Bibliography tools
These tools are included in TeX Live and other comprehensive distributions.

• amsrefs supports the inclusion of structured bibliography data directly in LaTex source files
• BibTeX resources via public-domain TeX sites