This list contains ''Resource Description and Access'' (RDA) terms and corresponding three-character lower case alphabetic codes for RDA Content types. These types can be recorded in MARC21/UNIMARC Bibliographic and Authority records in textual form and/or in the three-character coded form in '''MARC21 field 336 (Content Type)''' and '''UNIMARC field 181 ( Coded Data Field: Content Form)'''. In MARC21/UNIMARC Bibliographic records, content types are also recorded, sometimes in a more granular and sometimes in a more general form, with one-character codes in the '''MARC21 Bibliographic''' '''Leader/06 (Type of material)'''. In the following, the three-character codes and terms for field 336 $b and $a (MARC21) and 181$c (UNIMARC), respectively, are listed along with the corresponding Leader/06 codes (MARC21).