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.
1. Postnasal drip. This is a sensation of mucus trickling from the back of your nose down into your throat. It may be due to hay fever, allergies or irritants. How postnasal drip causes a cough is still not clearly understood. In some cases, this sensation may not even be noticed.