Basic (basic)
Contains uppercase & lowercase letters, figures, accented characters and punctuation. These fonts also contain currency symbols ($, ¢, €, £, ¥), standard ligatures (fi, fl), common diagonal fractions (one-quarter, one-half, three-quarters), common math symbols, superscript numerals (1, 2, 3) and other symbols (including daggers, trademark, registered trademark, copyright, paragraph, litre, circled P, and "estimated" symbol, etc.).
All Caps (allcaps)
Same as
basic, but there is no lowercase (well, there is, but it's the same as the uppercase).
Latin 2 (latin2)
Support for the following Central, Eastern and Baltic European languages [as well as Western]: Croatian, Czech, Estonian, Hungarian, Latvian, Lithuanian, Polish, Romanian, Serbian (Latin), Slovak, Slovenian and Turkish. In addition to 1252 Latin 1, these fonts support 1250 Latin 2, 1254 Turkish, and 1257 Windows Baltic.
Extended (extended)
Includes additional Latin characters beyond the combined
latin2 Western and Central European character sets to support languages such as Maltese and Esperanto.
Greek (greek)
Includes the characters and punctuation required to support the modern Greek language.
Small Caps (smcp)
Fonts with small caps contain all of the
latin2 accented characters (and extended, if the base glyphs support extended) as well as the
ss01 feature to create roman numerals.
Oldstyle Numerals (onum)
A.K.A., non-lining numerals, or lower case numerals