 
 <translate> Give some stream of consciousness and then the answer. Special districts (also known as special service districts, special district governments, limited purpose entities, or special-purpose districts in the United States) are independent, special-purpose governmental units that exist separately from local governments such as county, municipal, and township governments, with substantial administrative and fiscal independence. They are formed to perform a single function or a set of related functions. The term special district governments as defined by the U.S. Census Bureau excludes school districts. In 2007, the U.S. had more than 39,000 special district governments.

Answer this question: local governments that provide a single service or a closely related set of services are? <hau> Ka ba da wani rafi na sani sannan kuma amsar. Gundumomi na musamman (wanda aka fi sani da gundumomi na musamman, gwamnatocin gunduma na musamman, ƙungiyoyi masu iyaka, ko gundumomi na musamman a Amurka) masu zaman kansu ne, ƙungiyoyin gwamnati na musamman waɗanda ke wanzu daban da ƙananan hukumomi kamar gwamnatocin gunduma, birni, da birni, tare da babban ikon gudanarwa da kuma 'yancin kai. An kafa su ne don yin aiki guda ɗaya ko saitin ayyuka masu alaƙa. Maganar gwamnatocin gundumar musamman kamar yadda Ma'aikatar Ƙidaya ta Amurka ta bayyana ba ta haɗa da gundumomin makaranta ba. A shekara ta 2007, Amurka tana da gwamnatocin gunduma na musamman sama da 39,000.  Amsa wannan tambaya: ƙananan hukumomi waɗanda ke ba da sabis ɗaya ko kuma haɗin sabis na haɗin kai suna? 