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