The DRS stands for Drag Reduction System, which enables a car to open its rear wing to limit the downforces on the car. This increases the car's theoretical performance and in theory facilitates passing.
The surgical treatments for obstructive sleep apnea include nasal surgery, palate surgery (including uvulopalatopharyngoplasty [UPPP]), upper airway stimulation therapy, tongue reduction surgery, genioglossus advancement, maxillo-mandibular advancement, tracheostomy, and bariatric surgery.
CPAP is the most popular treatment for obstructive sleep apnea and stands for Continuous Positive Airway Pressure. It uses air pressure to keep the airway open during sleep. The CPAP machine varies in size. Most are about the size of a lunch box.