If the document opened in the IFRAME does not have any targets set, then all those links will open in the same iframe as the parent document. You can use this feature to make links in one IFRAME change the contents of another IFRAME on the same page. IFrames and Security. The IFRAME element, by
Sigma notation, often referred to as summation notation, can be used in many common situations. For example, it can be used to calculate the sum of deposits for a bank account. Banks add together all deposits and withdrawals to determine the current balance.
The term is derived from the Greek letter sigma, a mathematical term that represents a measure of variation. According to Motorola, Six Sigma has had non-manufacturing applications in transactional processes, such as billing and customer support.