797|Aquatic & air sports - 797 953|Arabian Peninsula & adjacent areas - 953 998|Arctic islands & Antarctica - 998 520|Astronomy & allied sciences - 520 657|Accounting - 657 354|Administration of economy & environment - 354 022|Administration of physical plant - 022 374|Adult education - 374 659|Advertising & public relations - 659 496|African languages - 496 896|African literatures - 896 492|Afro-Asiatic languages; Semitic languages - 492 892|Afro-Asiatic literatures; Semitic literatures - 892 630|Agriculture & related technologies - 630 358|Air & other specialized forces - 358 512|Algebra - 512 965|Algeria - 965 494|Altaic, Uralic, Hyperborean & Dravidian - 494 894|Altaic, Uralic, Hyperborean & Dravidian - 894 812|American drama in English - 812 814|American essays in English - 814 813|American fiction in English - 813 817|American humor & satire in English - 817 816|American letters in English - 816 810|American literature in English - 810 818|American miscellaneous writings - 818 811|American poetry in English - 811 815|American speeches in English - 815 169|Analogy - 169 515|Analysis - 515 543|Analytical chemistry - 543 180|Ancient, medieval & eastern philosophy - 180 283|Anglican churches - 283 636|Animal husbandry - 636 590|Animals (Zoology) - 590 229|Apocrypha & pseudepigrapha - 229 239|Apologetics & polemics - 239 621|Applied physics - 621 158|Applied psychology - 158 721|Architectural structure - 721 720|Architecture - 720 724|Architecture from 1400 - 724 723|Architecture from ca. 300 to 1399 - 723 722|Architecture to ca. 300 - 722 711|Area planning - 711 982|Argentina - 982 168|Argument & persuasion - 168 185|Aristotelian philosophy - 185 513|Arithmetic - 513 595|Arthropods - 595