Comodo Internet Security (CIS), developed by Comodo Group, is an Internet security suite for Microsoft Windows. It includes an antivirus program, a personal firewall, a sandbox and a host-based intrusion prevention system (HIPS) called Defense+.
A delta is a triangular deposit of sediment at the end of a river or stream.   Delta is the fourth letter in the Greek alphabet, it equates to the Roman D. A river delta is a triangular or D shaped area at the mouth of a river, such as the Mississiâ¦ppi Delta; check its appearance on a map.
Uppercase delta has two different mathematical meanings. Both meanings begin with the letter D just like the Greek letter, which should help you remember them: Difference is the most common meaning of the uppercase delta. It is simply the difference or change in a certain quantity. When we say delta y, for example, we mean the change in y or how much y changes. Discriminant is the second most common meaning of the uppercase delta.