HMRC collects books with priority given to materials focusing on Houston and Texas in the following categories: non-fiction, biographies and autobiographies, fiction, poetry, young adult and children’s materials, and government documents. The map collection concentrates on street maps for Texas communities, key maps for Harris and the surrounding counties, aerial photography maps of greater Houston, specialized book maps, and flood insurance rate maps. The archival collections focus on non-current records of local government, corporations, businesses, public and private associations, religious institutions, cultural and civic organizations, labor groups, educational institutions, and any other organization or group that has played a role in the development of Houston. HMRC also actively solicits the public and private papers of individuals whose records may shed light on important historical events or trends in the history of the area. Other notable holdings include-