\SPACE
The \
(space) command produces a normal interword space. It's
useful after punctuation which shouldn't end a sentence. For example
Knuth's article in Proc.\ Amer.\ Math\. Soc.\ is fundamental
.
It is also often used after control sequences, as in \TeX\ is a
nice system.
In normal circumstances, \
<tab> and \
<newline>
are equivalent to \
.