| M | 1-5000 | Music |
| 1 . A1-A15 | Music Printed or Copied in Manuscript in the United States or the Colonies Before 1860 |
| 2-2.3 | Collections of Musical Scores |
| 3-3.1 | Collected Works of Individual Composers |
| 3.3 | First Editions |
| 5-1490 | Instrumental Music |
| 6-175.5 | Solo Instruments |
| 176 | Instrumental Music for Motion Pictures |
| 176.5 | Instrumental Music for Radio and Television |
| 177-990 | Music for Two or More Solo Instruments |
| 180-298.5 | Duets |
| 300-386 | Trios |
| 400-486 | Quartets |
| 500-586 | Quintets |
| 600-686 | Sextets |
| 700-786 | Septets |
| 800-886 | Octets |
| 900-986 | Nonets and Larger Combinations of Purely Chamber Music |
| 990 | Chamber Music for Instruments of the 18th Century and Earlier |
| 1000-1075 | Orchestra |
| 1100-1160 | String Orchestra |
| 1200-1269 | Band |
| 1270 | Fife (Bugle) and Drum Music, Field Music, etc. |
| 1350-1353 | Reduced Orchestra |
| 1356-1356.2 | Dance Orchestra and Instrumental Ensembles |
| 1360 | Mandolin and Similar Orchestras od Pleactral Instruments |
| 1362 | Accordion Band |
| 1365 | Ministrel Music |
| 1366 | Jazz Ensembles |
| 1375-1420 | Instrumental Music |
| 1450 | Dance Music |
| 1470 | Chance Compositions |
| 1473 | Electronic Music |
| 1480 | Music with Color Apparatus, etc. |
| 1490 | Music, Printed or Copied in Manuscript, Before 1700 | |
| 1495-5000 | Vocal Music |
| 1497-1998 | Secular Vocal Music |
| 1500-1527.8 | Dramatic Music |
| 1528-1529.5 | Duets, Trios, etc. for Solo Voices |
| 1530-1546.5 | Choruses with Orchestra or Other Ensemble |
| 1547-1600 | Choruses, Part-Songs, etc. With Accompaniment of Keyboard or Other Solo Instrument, or Unaccompanied |
| 1608 | Choruses, etc. in Tonic Sol-Fa Notation |
| 1609 | Unison Choruses with or Without Accompaniment of Every Kind |
| 1610 | Cantatas, Choral Symphonies, etc for Unaccompanied Chorus (Secular and Sacred) With or Without Solo Voices |
| 1611-1624.8 | Songs for One Voice |
| 1625-1626 | Recitations, Gesprochene Lieder, With Accompaniment |
| 1627-1853 | National Music |
| 1900-1980 | Songs (Part and Solo) of Special Character |
| 1985 | Musical Games |
| 1990-1998 | Secular Music for Children |
| 1999-2199 | Sacred Vocal Music |
| 1999 | Collections |
| 2000-2007 | Oratorios |
| 2010-2017.7 | Services |
| 2018-2019.5 | Duets, Trios, etc. for Solo Voices |
| 2020-2036 | Choruses, Cantatas, etc. |
| 2060-2101.5 | Choruses, Part-Songs, etc. With Accompaniment of Keyboard or Other Solo Instrument |
| 2102-2114.8 | Songs for One Voice |
| 2115-2146 | Hymn, Psalm, and Choral Books |
| 2147-2188 | Liturgy and Ritual |
| 2147-2155.6 | Roman Catholic |
| 2156-2160.87 | Orthodox Churches |
| 2161-2183 | Protestant Churches |
| 2184 | Other Christian Churches |
| 2186-2187 | Jewish |
| 2188 | Other Non-Christian Regigions |
| 2190-2196 | Sacred Vocal Music for Children |
| 2198-2199 | Temperance, Revival, Rescue, and Gospel Songs |
| 5000 | Unidentified Compositions |
| ML | 1-3930 | Literature of Music |
| 48-54.8 | Texts for Music |
| 110-158 | Bibliography |
| 155-158 | Sound Recordings |
| 159-3799 | History and Critcism |
| 410 | Composer Biographies |
| 459-1380 | Instruments and Instrumental Music |
| 1100-1380 | Chamber and Orchestral Music, Band (Military Music), Electronic Music |
| 1400-3275 | Vocal Music |
| 1500-1554 | Choral Music (Sacred and Secular) |
| 1600-2881 | Secular Vocal Music |
| 2900-3275 | Sacred Vocal Music |
| 3400-3465 | Dance Music |
| 3469-3541 | Popular Music |
| 3544-3776 | National Music |
| 3800-3923 | Philosophy and Physics of Music |
| 3928-3930 | Juvenile Literature |
| MT | 1-960 | Musical Instruction and Study |
| 40-67 | Composition |
| 68 | Improvisation |
| 70-86 | Orchestra and Orchestration |
| 90-146 | Analytical Guides, etc. |
| 170-810 | Instrumental Techniques |
| 820-949 | Singing and Voice Culture |
| 955-960 | Production of Operas, Music in Theaters |
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