The files offer an Adobe Type 1 format version of the 5pt, 7pt and 10pt versions of the bbold fonts. The distribution also includes a map file, for use when incorporating the fonts into TeX documents, but no macro sets are provided (the fonts will not provide the correct results using macros designed for use with the MetaFont versions of the fonts. The fonts were produced to be part of the TeX distribution from Y&Y; they were generously donated to the TeX Users' Group when Y&Y closed its doors as a business.