Tablets have become increasingly popular over the past few years, replacing notebooks, portable DVD players, and even books and magazines. The accessibility and efficiency of these portable devices makes them extremely popular in the market, however, not all companies that attempt to produce tablets are successful. For now, Apple is the leading manufacturer of tablets with their multiple versions of the iPad and new versions on the way. The popularity of useful, entertaining apps makes the iPad more desirable than other tablets. However, Apple may not hold this lead for long as other companies begin to join the race to create better tablets. Samsung is currently the number two tablet manufacturer, with Microsoft, Nokia, and Amazon following. Overall, the demand for tablets has significantly risen and continues to rise with predictions that “tablets will outship PCs on an annual basis in two years.”