The Alpha-Numeric System for Classification of Recordings (ANSCR)
is composed of the following categories into which all sound recordings are organized.
| A | Early Music |
| B | Operas |
| C | Choral Music |
| D | Vocal Music |
| EA | General Orchestral |
| EB | Ballet Music |
| EC | Concertos |
| ES | Symphonies |
| F | Chamber Music |
| GG | Guitar |
| GO | Organ |
| GP | Piano |
| GS | Stringed Instruments |
| GV | Violin |
| GW | Wind Instruments (Includes Brass) |
| GX | Percussion and Unusual Instruments |
| H | Band Music |
| HP | Patriotic Music |
| J | Electronic or Mechanical Music |
| K | Musicals and Operettas |
| L | Soundtracks |
| MA | Popular Music |
| MC | Country/Western Music |
| MG | Gospel and Contemporary Christian Music |
| MJ | Jazz |
| MN | New Age Music |
| MP | Rap Music |
| MR | Rock Music |
| O | Jewish Music |
| P | American Folk and Ethnic Music |
| Q | International Folk and Ethnic Music |
| R | Holiday Music |
| S | Varieties and Humor |
| T | Plays |
| U | Poetry |
| V | Prose |
| W | Documentary: History and Commentary |
| X | Instructional |
| Y | Sounds and Special Effects |
| ZM | (E) Preschool Music |
| ZS | Preschool Stories |
| ZI | Juvenile Instruction |
| ZM | (J) Juvenile Music |