Description

The nobr element is a proprietary (as in not based on any standard) one that was used to define sections of text that the browser should not allow to wrap, regardless of what may happen, for example the user resizing the window to a small viewport. As it is deprecated - and the effects can be achieved using CSS - you should not use the element; this is here for reference only.

Using the telephone number example shown here, the image below shows the number firstly if it were viewed with plenty of window width, and secondly where the nobr element content gets wrapped:

Use this for…

Anything goes.

Compatibility

The nobr element has good support in modern browsers (for backwards-compatibility reasons) but should not be used. The pre element may be a suitable HTML alternative in some circumstances, but most likely you would opt for a CSS-based solution (white-space:nowrap). If you are not positive that your intended audience has browsers that support the white-space CSS property (refer to server logs and stats to be sure), you may opt for using the non-breaking space HTML entity  . That entity is never to be used for the purposes of creating arbitrary space/padding effects, but substituting a single space character with a non-breaking space for this purpose is acceptable (if somewhat uglier to the eye).