The majority of other text fonts commonly used for book production are defective in their support for one or more characters from this block. Accordingly, many academics working in the area of Sanskrit studies now make use of free and open-source software like LibreOffice, instead of Microsoft Word, in conjunction with free OpenType fonts like FreeSerif or Gentium, both of which have complete support for the full repertoire of conjoined diacritics in the IAST character set. Released under the GNU FreeFont or SIL Open Font License, respectively, such fonts may be freely shared and do not require the person reading or editing a document to purchase proprietary software to make use of its associated fonts.