Palmpilot
Touchdown! Greaser!
After the subject of sleep apnea came up in another thread, I found an NIH video that does a good job of explaining it and the use of CPAP machines to treat it.
http://www.nhlbi.nih.gov/health/health-topics/topics/cpap/
http://www.nhlbi.nih.gov/health/health-topics/topics/cpap/