Microsoft Sans Serif™ Regular is a very legible User Interface (UI) font. It was designed to be metrically compatible with the MS Sans bitmap font that shipped in early versions of Microsoft Windows. The original MS Sans was in the inflexible .fon bitmap format and could not be scaled. Microsoft Sans Serif Regular is much more flexible and legible as it font antialiasing and scalable user interfaces. Character Set: Latin-1, WGL Pan-European (Eastern Europe, Cyrillic, Greek and Turkish).