Jupiter Research forecasts that the U.S. installed base of handheld PDAs will number just over 14 million at the end of 2003 and will only grow to 20 million by 2008, a 7% penetration of the overall
U.S. population. The report also finds that the adoption of these portable devices increases as their size and complexity of use decreases. These findings were released in Jupiter's "PDAs: Optimizing
Integration" report. The study also sees handhelds that offer voice, personal information management or a combination of the two, and that focus less on other integrated functions to have a greater
chance for growth.