deprecated tags:

though some browsers may still support it, it is in the process of being dropped. Do not use it in old or new projects. pages or web apps using it may break at any time.

tag name tags found
<blink> 0
<center> 0
<frame> 0
<frameset> 0
<isindex> 0

non-standard tags:

do not use it on production sites facing the Web: it will not work for every user. there may also be large incompatibilities between implementations and the behavior may change in the future.

tag name tags found
<bgsound> 0
<blink> 0
<marquee> 0
<nobr> 0

obsolete tags:

although it may still work in some browsers, its use is discouraged since it could be removed at any time. try to avoid using it.

tag name tags found
<acronym> 0
<applet> 0
<basefont> 0
<big> 0
<dir> 0
<font> 0
<listing> 0
<plaintext> 0
<spacer> 0
<strike> 0
<tt> 0
<xmp> 0