sentences:  That same year, it joined Internet Systems in forming Library Systems & Services, a joint venture that provides library management services to public, academic and corporate libraries across the country.In addition, Follett purchased Book Wholesalers (BWI) – a distributor of children's books to public libraries.In 1998, to strengthen the company's ability to meet the needs of its customers, Follett aligned its various business units under three market groups – Higher Education, Elementary and High Schools and Libraries.