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.
A significant association exists between rhinitis (allergic), asthma, and chronic sinusitis. Post-nasal drip is mucus accumulation in the back of the nose and throat leading to, or giving the sensation of, mucus dripping downward from the back of the nose.