| K | Law in general; Comparative and uniform law; Jurisprudence | |
| KBR | History of canon law | |
| KBU | Law of the Roman Catholic Church; The Holy See | |
| KD to KDK | Law of the United Kingdom and Ireland | |
| KDZ | America; North America | |
| KE | Law of Canada | |
| KF | Law of the United States | |
| KG | Latin America - Mexico and Central America - West Indies; Caribbean area | |
| KH | South America | |
| KJ to KKZ | European Law | |
| KL to KWX | Asia and Eurasia, Africa, Pacific Area, and Antarctica | |
| KZ | Law of Nations |