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.
It generally runs down the back of the throat unnoticed. Sickness such as a cold, the flu, or a sinus infection can cause this naturally occurring mucous to build up and thicken causing the post nasal drip to become more noticeable. It can also cause a cough, sore throat, and difficulty swallowing. [3]