• 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