| Call # | Title | Volumes | Years |
| F 868 O6 | OC Metro | 2005-cur | |
| GC 1 O24 | Oceans | 1-2 2-22 |
1969 flm 1969-89 ceased publication |
| HV 9105 0445 | Office of Juvenile Justice and Delinquency | scattered issues | |
| ind BS 410 O4 | Old Testament Abstracts Also online in the Ebsco databases |
1- | 1978-cur |
| BV 447 O5 | On Course | 2006-cur | |
| HV 5825 O62 | ONDCP Drug Policy Information | scattered issues | |
| HC 107 C22 O72 | Orange County Business Journal | current six months | |
| D 839 O7 | ORBIS | 32- | 1988- scattered issues |
| BF 636 A1 O7 | Organizational Behavior & Human Decision Processes | 33-53 | 1984-92 plus scattered issues |
| HD 28 O76 | Organizational Dynamics | 12-25 | 1983-96 |
| BV 625 O8 | Other Side | 11-40 | 1975-04 discontinued |
