Fannoni suna bambanta tsakanin kafaffun da ake samu a kusan dukkanin jami'o'i kuma suna da tsararrun rostoci na mujallu da tarurruka, da masu tasowa wadanda anda wasu jami'o'i da wallafe-wallafe kadan ne kawai ke gudanar da su. Wani fanni na iya samun rassa, kuma ana kiran wadannan sau da yawa kananan-fannuka.
An bayar da wannan shacin a matsayin bayyani na da kuma jagorar maudu'i ga fannukan akadamik. A kowane hali shigarwa a matakin mafi girma na matsayi (misali, Ilimin-Bil'adama) rukuni ne na faffdaddun fannuka makusanta; shigarwa a matsayi mafi girma na gaba (misali, Musika) fanni ne da ke da dan yancin kai da kuma kasancewa ainihin huwiyar asali da masanansa suke ji; da kuma Kananan matakai na hairakin wadanda mafi akasari ba su da wani tasiri a cikin tsarin gudanarwar jami'a.
Classification of Instructional Programs (CIP 2000): Developed by the U.S. Department of Education's National Center for Education Statistics to provide a taxonomic scheme that will support the accurate tracking, assessment, and reporting of fields of study and program completions activity.