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.
Viruses, bacteria, allergens, and irritants can cause inflammation of the nasal mucous membranes, which results in rhinitis. Once inflamed, the nose produces excessive mucus, which causes a runny nose, nasal congestion, and postnasal drip (when mucus drips from the sinuses, down the throat). Allergic rhinitis is one of the most common allergies.