| OZe | sports b-out d-out ah |
| OZ2e | AODU by athlete ah |
| OZ2.2e | screening for AODU in athletes ah |
| OZ4e | AODE on athletic performance ah |
| OZ4.2 | . AODU to enhance sports performance ah |
| OZ4.2.2 | . . doping ah |
| OZ6 | amateur and professional sports ah |
| OZ6.2e | . amateur sports ah |
| OZ6.2.2 | . . school sports ah |
| OZ6.2.2.2 | . . . high school sports ah |
| OZ6.2.4 | . . college sports ah |
| OZ6.4e | . professional sports ah |
| OZ8 | individual and team sports ah |
| OZ8.2 | . individual sports ah |
| OZ8.4 | . team sports ah |
| OZ8.4.2 | . . football ah |
| OZ8.4.4 | . . rugby ah |
| OZ8.4.6 | . . soccer ah |
| OZ8.4.8 | . . baseball ah |
| OZ8.4.10 | . . basketball ah |
| OZ8.4.12 | . . ice hockey ah |
| OZ10 | sports by physical environment ah |
| OZ10.2 | . ground sports ah |
| OZ10.2.2 | . . running ah |
| OZ10.4 | . snow and ice sports ah |
| OZ10.6 | . water sports ah |
| OZ10.6.2 | . . scuba diving ah |
| OZ10.6.4 | . . swimming ah |
| OZ10.6.6e | . . boating, sailing ah |
| OZ10.8 | . air sports ah |
| OZ10.10 | . motor sports ah |
| OZ12e | sporting event ah |
| OZ12.2e | . AOD use at sporting event ah |
| OZ12.4 | . specific sporting event ah |
| OZ12.4.2 | . . NCAA sporting event ah |
| OZ12.4.4 | . . Olympic Games ah |
| OZ12.4.6 | . . Super Bowl ah |
| OZ12.4.8 | . . World Series ah |
| OZ12.4.10 | . . World Cup ah |
| OZ12.4.12 | . . NBA basketball championship ah |
| OZ12.4.14 | . . Stanley Cup championship ah |
classification thesaurus glossary dictionary definition subject heading list ontology vocabulary knowledge structure knowledge organization terminology concept