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.
Post-nasal drip occurs when thick or excessive amounts of mucus drip into the back of the throat. The inflammatory substances in the drip coupled with trying to clear the excessive mucus, causes irritation and discomfort. Excess mucus running down the throat may cause hoarseness and lead to a cough. In fact, post-nasal drip is the most common cause of coughs. Other common symptoms include tickling in the throat, snorting, constant clearing of the throat, and difficulty breathing. A sore throat results due to the continual attempts to clear the excess mucus.