- just what we need 480 px - most popular value of mobile screen width while in landscape mode; - tells the browser about screen scale value (it also enables the zoom); 1em = 100% ≈ 12pt ≈ 16px (but this is not always true); - a better way for inserting flash into the page; Flexible Box Model - the future of responsive design; Benson's Bubbler - example of how Sencha compresses the images; you can use the bookmarklet to check the images size using javascript; There is some sort of UAProfs besides user agent; Opera Mini transfers all requests through Opera caching server; XHTML-MP - mobile profile for "old" phones; - doctype for XHTML-MP; Your Dashboard - access keys in XHTML-MP; For correct work of Opera Mini site must use XHTML-MP profile;