Tags which are degraded in HTML5
Removed tag Usage Alternative HTML tags Alternative CSS properties <acronym> acronym or abbreviation for a word <abbr> <applet> Java applet <object> <basefont> default font size for a document font, font-family, font-size, font-size-adjust, font-stretch, font-style, font-variant, font-weight, @font-face <big> text font size one size bigger font-size <center> center content horizontally within the containing element text-align <dir> directory <ul> <font> font size, color and face font, font-family, font-size, font-size-adjust, font-stretch, font-style, font-variant, font-weight, @font-face <frame> area in which another HTML document can be displayed <iframe> ...