78% of all Americans now own cell phones, up from 65% in 2004 and 73% in 2006. Among those who are working, fully 89% own a cell phone, up from 82% in 2006. Personal digital assistants (PDAs), such as Blackberries, are also becoming more common among working Americans. Overall, 13% of Americans and 19% of those who are working own a PDA or Blackberry (up from 14% of workers in 2006). Most PDA owners (69%) say their PDAs double as cell phones. This trend is also rapidly increasing; in 2006 only 26% used their PDAs as cell phones, according to Pew Internet Project.