<p>Does anyone remember the <code>XMP</code> tag?</p>

<p>What was it used for and why was it deprecated?</p>

A quick Google search on W3C reveals that
```
XMP
```
was introduced for displaying
preformatted text
in HTML 3.2 and earlier. When W3C deprecated the
```
XMP
```
tag, it suggested using the
```
PRE
```
tag as a preferred alternative.
Update:
http://www.w3.org/TR/REC-html32#xmp
,
http://www.w3.org/MarkUp/html-spec/html-spec_5.html#SEC5.5.2.1