The issue focused on software applications such as browsers and PDF readers that download digital books when users click on links in websites. Most computers cannot handle digital books at their native resolution. Instead, computer processors convert them into formats suitable for PCs and laptops. For example, CDs can play CDs but DVDs cannot play DVDs. Computers run programs called desktop apps that store digital books on hard disks or CDs. PC owners often select desktop apps because they offer features such as instant downloads of electronic versions of digital books from libraries or publisher