... font size of 16 pixels, and the<h1> tag to have a font size of 120 percent, its size will be 120 percent of16 pixels, which is 19 .2 pixels.Ems are also relative, and work inexactly the ... standsfor (you guessed it!) Mac, Apache,MySQL, and PHP. Mac users will headon over to http://mamp.info and download the free version of the server.Once you download and unpack theZIP and ... thesewill control floats, widths, backgrounds, and fonts. NoteTo learn more about object-oriented CSS, seehttp://coding.smashingmagazine.com /20 11/ 12/ 12/ an-introduction-to-object-oriented-css-oocss/....