What are NCR’s and CER’s?
Instead of simply including a character such as an “a” in a file, you can instead write it using the character code, as “a”(the hex value) or “a” (the decimal value, you can find these in the code charts at http://www.macchiato.com/unicode/charts.html). Few people use this for ASCII, of course, but it does allow you to put the occasional character such as a trademark sign (™) or alpha (α) in your text. CER’s are similar, except that they use abbreviations, such as “é” instead of numbers.