This is covered in many tutorials like lshort. But here's a more complete list:
\LaTeX
typesets the LaTeX logo
\LaTeXe
typesets the LaTeX2e logo
\TeX
typesets the original TeX logo. You can often use it to obtain other TeX-based logos.
\AmSTeX
, \BibTeX
, \SliTeX
and \PlainTeX
typeset what their names say. These are defined in the doc
package.
\XeTeX
, \XeLaTeX
, \LuaTeX
and \LuaLaTeX
can be obtained with the metalogo
package
- e-TeX and some other logos are available in package
hologo
- Finally, you can get the METAFONT logo with the package
mflogo
The metalogo
package also allows you to customize the appearance of \TeX
, \LaTeX
, \LaTeXe
, \XeTeX
, \XeLaTeX
, \LuaTeX
and \LuaLaTeX
logos, which is useful if you use a font other than Computer Modern.
See also https://texfaq.org/FAQ-logos.
\LaTeX
. You don't need a package for this. See How to write (La)TeX (with braces) or any other TeX-related logo