Carbon Copy (software) Carbon Copy was an early remote control and file transfer software for DOS and Windows published by Microcom. It allowed remote access to a computer via dial-up modem connection.
A viral infection (the common cold) is the most common cause of a stuffy and/or runny nose, but allergies, influenza, and sinus infections also may cause these symptoms. Less commonly, anatomical obstructions (e.g. a deviated nasal septum, foreign bodies) may lead to nasal congestion.
Sinus x-rays or sinus CT (computed tomography) scan may show evidence of sinusitis. Causes of postnasal drip include sinusitis, allergic rhinitis, and vasomotor rhinitis. Postnasal drip syndrome is the most common cause of chronic cough. Chronic cough due to postnasal drip is generally treated with decongestants and antihistamines, with or without nasal steroid sprays. Treatment may also include a vasoconstrictor such as oxymetalazone, which should not be used for more than 5 days.