| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 2026 |  | Oculo-pharyngeal Dystrophy | 1975; 1985 | Image/MovingImage | ehsl_novel_dgc |
| 2027 |  | Oculocephalic Reflex Animation | 2000 | Image/MovingImage | ehsl_novel_novel |
| 2028 |  | Oculomasticatory Myorhythmia | 1986 | Image/MovingImage | ehsl_novel_shw |
| 2029 |  | Ogden Air Jubilee; Peach Day Festival at Brigham City: Japanese American Citizens League home movie 7 | 1928 | Image/MovingImage | uum_hmc |
| 2030 |  | Oh Great, I Get to Follow the Post-Op Homonymous Hemianopsia (Presentation Video) | 2006 | Image/MovingImage | ehsl_novel_fbw |
| 2031 |  | Old Ski Film, Pine Mountain | 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969; 1970 | Image/MovingImage | uum_hmc |
| 2032 |  | Olympics 2 and 3 | 2002 | Image/MovingImage; Sound | uum_thifc |
| 2033 |  | On changing a society | 1974-01-16 | Image/MovingImage | uum_piiha |
| 2034 |  | On recreating the self | 1974 | Image/MovingImage | uum_piiha |
| 2035 |  | Once a tree | 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960 | Image/MovingImage | uum_avac |
| 2036 |  | Once Upon an MRI Dreary (Presentation Video) | 2005-02 | Image/MovingImage | ehsl_novel_fbw |
| 2037 |  | One and Half Syndrome | 1991 | Image/MovingImage | ehsl_novel_rbd |
| 2038 |  | Opsoclonus | 1991 | Image/MovingImage | ehsl_novel_rbd |
| 2039 |  | Opsoclonus | 1986 | Image/MovingImage | ehsl_novel_jmec |
| 2040 |  | Opsoclonus | 1986 | Image/MovingImage | ehsl_novel_jmec |
| 2041 |  | Opsoclonus in an Infant | 1991 | Image/MovingImage | ehsl_novel_rbd |
| 2042 |  | Oral History Interview of Joyce A. Westenskow | 2006-01-21 | Image/MovingImage | gb_nhaoh |
| 2043 | | Oral History Interview of LaVon Rowley | 2006-01-19 | Image/MovingImage | gb_nhaoh |
| 2044 |  | Orange A. Olsen audio-visual collection, film 1 (Fixed): Clips of a Bull, American Badger, Pika, and a Beaver | 1926 | Image/MovingImage | uum_hmc |
| 2045 |  | Orange A. Olsen audio-visual collection, film 11: Clips of Moose | 1933 | Image/MovingImage | uum_hmc |
| 2046 |  | Orange A. Olsen audio-visual collection, film 12: Clips of Moose | 1933 | Image/MovingImage | uum_hmc |
| 2047 |  | Orange A. Olsen audio-visual collection, film 13: Clips of Moose stuck in Mud | 1932 | Image/MovingImage | uum_hmc |
| 2048 |  | Orange A. Olsen audio-visual collection, film 14: Clips of Moose stuck in Mud | 1932 | Image/MovingImage | uum_hmc |
| 2049 |  | Orange A. Olsen audio-visual collection, film 15: Clips of a Robin, Birds, a Nest with Eggs, and Moose | 1939 | Image/MovingImage | uum_hmc |
| 2050 |  | Orange A. Olsen audio-visual collection, film 16: Clips of Buffalo, Elk, and a Geyser | 1942 | Image/MovingImage | uum_hmc |