Componisten O
| Christian O'Brien (-) Australië | |
| Didig Hapus | trp-trb-gtr |
| Pit_t | trp-trb-gtr |
| Jana Obrovska (1930-1987) Tsjechië | |
| Concert voor 2 gitaren en orkest | 2gtr-ork |
| Concerto meditativo pro kytaru a smyčce, 1971 | gtr-str.ork |
| Due Musici voor 2 gitaren | 2gtr |
| Hommage à Bela Bartok | gtr |
| Hommage to a Gothic Chorale | gtr |
| Preludes 1 t/m 6 | gtr |
| Quatre Images du Japon | gtr |
| Suite in old style voor fluit en gitaar | fl-gtr |
| Luis Ochoa (1959-2014) Venezuela | |
| Pathy of History (Variations) | gtr |
| Helmut Oehring (1961) Duitsland | |
| Sexton A. | gtr |
| Das Blaumeer (aus: Einkehrtag) (2003) | zang-e.gtr-ork-electron |
| Foxfire Eins (natriumpentothal) | gtr |
| Ich.Stille. (aus: Rehnebel/Opfer/Puderfinger) | fl-gtr-cd (fl(b)-gtr-perc-CD) |
| Mich Stille | 4gtr |
| Philipp | gtr |
| Kris Oelbrandt (1972) België | |
| Three capriccios : for guitar | gtr |
| Mauricio Ohana (1914-1992) Spanje | |
| Anonyme XXme Siècle voor 2 gitaren | 2gtr |
| Cadran Lunaire voor 10 snarige gitaar | gtr |
| Concerto voor gitaar en orkest ( Trois Graphiques ) | gtr-ork |
| Llanto por Ignacio Sánchez Mejias | voc(bar)-koor-ens(gtr) |
| Si le jour paraît ( suite voor 10 snarige gitaar ) | gtr |
| Tiento voor gitaar | gtr |
| Homage à Luis Milan | gtr |
| Pedro Olaya (1911-1941) Spanje | |
| Canción voor cello en gitaar | gtr-vc |
| Jane O'Leary (1946) USA | |
| Four Pieces | gtr |
| Julio César Oliva (1947) Mexico | |
| Las Eseñanzas | 3gtr |
| Tangomania | gtr |
| Los Cuatro Elementos voor 4 gitaren | 4gtr |
| Tres instantes de Extasis | gtr |
| Vivienne Olive (1950) Engeland | |
| “Tides of a current flowing....” | gtr |
| Another one for JP | gtr |
| Ceilidh – Concerto for guitar and orchestra | gtr-ork |
| Fantasy on the folksong, “A poor wayfaring stranger” (violin and guitar/cello and guitar | vl-gtr/vc-gtr |
| Sarabande for John (guitar quintet) | 5gtr |
| Text IV | gtr |
| Kent Olofsson (1962) Zweden | |
| Alambic I - for alto guitar and electronics | a.gtr-electr |
| Corde — for guitarist and orchestra | gtr-ork |
| Il Liuto d'Orfeo for guitar and tape | gtr-tape |
| Parcæs Cordes (a.fl-a.gtr-vla-tape) | a.fl-a.gtr-vla-tape |
| Sonata for guitar | gtr |
| Tarpeian Rock (a.fl-b.cl-gtr-vc-perc-synth) | a.fl-b.cl-gtr-vc-perc-synth |
| The Emerald Windstrings - for clarinet and guitar | kl-gtr |
| The Garden Of Earthly Delights (gtr-kamerensemble-tape) | gtr-ens-tape |
| Treccia For Guitar | gtr |
| Roel van Oosten (1958) Nederland | |
| Scapin voor gitaar | gtr |
| Ernst Oosterveld (1951) Nederland | |
| Git3 : for guitar trio, 1988 gitaar met electronica | 3gtr-electron |
| Julián Orbón (1925-1991) Spanje/Cuba/USA | |
| Preludio y Danza (1951) | gtr |
| Osten Mikal Ore (-) Denemarken | |
| Des traces de son… | gtr |
| Sergei Orekhov (1935) Rusland | |
| Troïka Variaties voor gitaar | gtr |
| Carl Orff (1895-1982) Duitsland | |
| Einzug ud Reigen | bl.fl-gtr-vc |
| Jesús Ortega (1935) Cuba | |
| Puntos | gtr |
| Recitativo y Fuga | gtr |
| Tres Preludios | gtr |
| William Ortiz-Alvarado (1947) Puerto Rico/USA | |
| Rapsodia, guitar (1970-79) | gtr |
| 3 Fragmentos para Guitarra, guitar (1973) | gtr |
| Pavana, guitar (or piano) (1977) | gtr |
| Suite: Tercer Mundo, flute, recorder, 2 guitars and percussion (1977) | fl-bl.fl-2gtr-perc |
| Síntesis, guitar and tape (1979) | gtr-tape |
| Dualidad, 2 guitars (1979) | 2gtr |
| Amor, Cristal y Piedra, guitar, harp and hapsichord (1980) | gtr-hrp-clav |
| Piezas Típicas Puertorriqueñas, 2 guitars (1981) | 2gtr |
| Toque, 4 guitars (1981) | 4gtr |
| Abrazo voor gitaarkwartet (1984) | 4gtr |
| Canción nacida de Lucha, folk song, chorus and guitar; or voice and guitar (1985) | koor-gtr |
| A Delicate Fire, contralto and guitar (1986) | alt-gtr |
| HY-1-4175, guitar and piano (1987) | gtr-pno |
| Romance, boy soprano (or soprano) and guitar (1988) | sop-gtr |
| A Sensitive Mambo in Transformation (e.gtr-synth-perc-e.bas) 1991 | e.gtr-synth-perc-e.bas |
| Garabato, electric guitar (1992) | e.gtr |
| Música de Fiesta, cuatro and guitar (1992) | cuatro-gtr |
| Sal Soul 96.2 FM, 4 guitars (1996) | 4gtr |
| Cantilena, guitar (1996) | gtr |
| Fotografía de Héctor, guitar (1997) | gtr |
| Ricanstructions, flute and guitar (1999) | gtr |
| Tropicalización (guitar concerto), guitar and chamber orchestra (1999) | gtr-kam.ork |
| Songs from the Bilingual, baritone and guitar (2000) | bar-gtr |
| Esta es la tierra de los que aguantan callados y pacientes por un nuevo despertar (guitar concerto), guitar & chamber orch(2001) | gtr-kam.ork |
| 121st Street Rap, guitar (2002) | gtr |
| Mark Orton (-) USA | |
| Herbert's Story [From the Movie Nebrask] arr. gitaar | gtr |
| Timme Ørvad (1943) Denemarken | |
| Preludio Pastorale (1964) | gtr |
| Fredrik Österling (1966) Zweden | |
| Nine – The Esoteric Charm of Austerity | fl-vla-gtr |
| Christóbal Oudrid (1825-1877) Spanje | |
| La Macarena, para violochelo y guitarra | gtr-vc |
| Rondena | gtr |
| Atanas Ourkouzounov (1970) Bulgarije | |
| 4 figures acoustiques | 4gtr |
| "Toryanse" Tales | gtr |
| Avant, guitar, | gtr-pno |
| Broken Dance | 4gtr |
| Cinq Illusions Sonores | 4gtr |
| Contes Des Balkans, guitar, | gtr |
| Cote Cour, guitar, | gtr |
| Cote Jardin, guitar, | gtr |
| Danse a deux, guitar, | gtr |
| Divertimento | 4gtr |
| Fantaisie D’apres Kapsberger, guitar, | gtr |
| Fantasia Bulgarica, guitar | gtr |
| Folk Song Variations | gtr |
| Four Greek Miniatures | gtr |
| Frammenti, guitar, | gtr |
| Horo | 2gtr |
| Kaleidoscore (Hommage à Keith Jarrett) | gtr |
| Macedonian Song | fl-gtr |
| Makedonski Pesen | fl-gtr |
| Prelude et Dance (piano and guitar) | gtr-pno |
| Reflet I, guitar, | gtr |
| Reflet II, guitar, | gtr |
| Revolving Lantern | 4gtr |
| Scherzo A Dix Cordes, cello, guitar, | gtr-vc |
| Sonate No. 1 (1996) | gtr |
| Sonate No. 2 (Hommage a Bartok) | gtr |
| Sonate No. 3 "Cycling Modes" (2014) | gtr |
| Sonate No. 4 (2016) | gtr |
| Sonate No. 5 (2018) | gtr |
| Sonatina Bulgarica, violin, guitar, | vl-gtr |
| Sonatine: Hommage À Theodisii Spassov | fl-gtr |
| Swirling Modes | 4gtr |
| Variations for Guitar, guitar, | gtr |
| Jerry Owen (1944) USA | |
| Gypsy Inspirations (fluit,altviool en gitaar) | fl-vla-gtr |
| Spillville var. on a theme by Dvorák - var. 14 Double Variat | fl-vla-gtr |
| Trio Concertante over Czech Folksongs | fl-vla-gtr |