Basically Depreciated Tags and Attributes are those that are only used in HTML.Means they are old Tags and Attributes that are not supported in the new versions of HTML,Like:XHTML.Because those are not used in future than we should have to avoid the use of them.
I have given you list of these Depreciated Tags and Attributes are given below:
List of Deprecated Attributes are:
color This is used to set the text color.
align This is used for Horizontal alignment of the table and frames with the value center,left and right.
bgcolor This is used to set background color.
List of Deprecated Tags are:
<u> This is used to underlined the text.
<font> This is used to set HTML font.
<strikeout>This is used to strikeout the text.
<center> This is used to centered the content.