| A B C D E F G H I J K L M N O P Q R S T U V W Y Z Months Countries, Provinces, States, etc. Abbreviations O
***Refer to AACR2, Appendix B for international character. | WORD/TERM | ABBREVIATION | SOURCE | | odbitka | odb. | AACR2 | | oddzial*** | odb. | AACR2 | | official | off. | TSLL | | ofitsial´nyi*** | ofits. | TSLL | | Old Testament | O.T. | AACR2 | | omarbeidet | omarb. | AACR2 | | opinion, -s | opin. | TSLL | | oplag | opl. | AACR2 | | opplag | oppl. | AACR2 | | opracowane | oprac. | AACR2 | | opus | op. | AACR2 | | order, -s | do not abbreviate | TSLL | | ordinance, -s | ord. | TSLL | | otisk | ot. | AACR2 | |