You have several things going on. The true type fonts and the ITC fonts are different publishers' versions of the same font family. I would just uninstall the ITC versions where you have duplicates and keep the true type version. Many fonts actually have a separate font file for each version of the font (bold/weight, italic, etc.). The applications software is smart enough to recognize font families and presents them as a single font where you can choose the variations in the application. That's just the way the fonts are stored. There is no way to reduce the number of files unless you start deleting variations (in which case, those variations won't work if you select them in the application). Where you have a separate file for...