I've been looking for ways to measure the complexity of my projects's source code, and have frequently come across the acronym "NCSS". There doesn't seem to be any clear, easy-to-find definition of what it stands for.
As far as I can infer, it has something to do with cyclomatic code complexity.
One of the places I saw "NCSS", is in the JavaNCSS tool: http://javancss.codehaus.org/