\TeX
The \TeX command is used to typeset the TeX logo in a specific way, with the 'E' lowered and the 'X' raised, which is the official logo of the TeX typesetting system.
Using \TeX to refer to the TeX typesetting system in a document.
\TeX\ is a typesetting system designed by Donald Knuth.
Expressing preference for the TeX system using the \TeX command.
I prefer \TeX\ over other typesetting systems for its precision.
Mentioning the use of TeX for typesetting a book.
The book was typeset using \TeX\ for high-quality output.