<NOBR> and </NOBR> mark a
block of text that should not contain line breaks -- line breaks are
forbidden, and the text will be presented as a single line, without
any word wrapping. This is useful for text that you do not wish
to be broken at word spaces, regardless of the page layout.
You can use <WBR> element inside
<NOBR> to allow for optional word breaks.
Inside <NOBR>, a <WBR> marks
a place where line breaking is allowed. <WBR> is
thus a conditional <BR> element, in that it does
not force a line break, but instead permits one where a break would
otherwise be forbidden. Note that <WBR> does
not require a closing tag.