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 may become worrisome if it is accompanied by symptoms such as persistent cough, severe stuffy nose, recurrent infections, blood tinged mucus, or voice changes. In severe or persistent cases of post-nasal drip, a patient may be referred to an ear, nose, and throat specialist, explains Dolan.It is more likely to be caused by the mucus becoming too thick or by irritation of your throat. In my experience, the three most common causes are allergy, gastric reflux, and medications that cause dryness.â. Here are some other common conditions that may cause post-nasal drip: 1  Cold or flu viruses. 2  Sinus infection.