Version 1.41 (supplied with Windows XP SP2) includes 2257 glyphs (2301 characters, 28 blocks), which extended Unicode ranges to include Combining Diacritical Marks, Currency Symbols, Cyrillic Supplement, Geometric Shapes, Greek Extended, IPA Extensions, Number Forms, Spacing Modifier Letters.
MS Sans Serif was given a PANOSE number that indicates it has "cove" serifs, While the PANOSE number for Microsoft Sans Serif indicates that is a sans serif.