| A. A. R.* | Arthur Alcock Rambaut, M.A., D.Sc., F.R.S.- Radcliffe Observer, Oxford. Professor of Astronomy in the University of Dublin and Royal Astronomer of Ireland 1892–1897.
|  | Airy. |
| A. C. L. | Sir Alfred Comyn Lyall, K.C.B.- See the biographical article: Lyall, Sir A. C.
|  | Abdur Rahman;
Afghanistan: History. |
| A. D. | Austin Dobson, LL.D- See the biographical article: Dobson, Henry Austin.
| | Addison (in part). |
| A. E. S. | Arthur Everett Shipley, M.A., D.Sc., F.R.S.- Fellow and Tutor of Christ’s College, Cambridge. Reader in Zoology in Cambridge University. Joint-editor of the Cambridge Natural History.
| | Acanthocephala. |
| A. F. B. | Aldred Farrer Barker, M.Sc.- Professor of Textile Industries at Bradford Technical College.
| | Alpaca. |
| A. F. P. | Albert Frederick Pollard, M.A. F.R.Hist.Soc.- Fellow of All Souls’ College, Oxford; Professor of English History in the University of London. Assistant-editor of the Dictionary of National Biography, 1893–1901.
| | Aconcio. |
| A. Gir. | Arthur Girault.- Professor of Political Economy at the University of Poitiers. Member of the International Colonial Institute. Author of Principes de colonisation (1907–1908).
| | Algeria: History. |
| A. G. H. | Albert George Hadcock, (late R.A.)- Manager of the Gun Department, Elswick Works, Newcastle-on-Tyne.
| | Ammunition (in part). |
| A. H. J. G. | Abel Hendy Jones Greenidge, M.A., D.Litt. (Oxon.) (d. 1905).- Formerly Fellow and Lecturer of Hertford College, Oxford, and of St John’s College, Oxford. Author of Infamia in Roman Law; &c.
| | Agrarian Laws (in part). |
| A. J. B. | Alfred Joshua Butler, M.A., D.Litt.- Fellow and Bursar of Brasenose College, Oxford. Fellow of Eton College.
| | Abyssinian Church. |
| A. J. G. | Rev. Alexander J. Grieve, M.A., B.D.- Professor of New Testament and Church History, Yorkshire United Independent College, Bradford.
| | Adoptianism; Alford;
Alsop, V.; Ambrose, St. |
| A. Mw. | Allen Mawer, M.A.- Professor of English Language and Literature, Armstrong College, Newcastle-on-Tyne; formerly Fellow of Gonville and Caius College, Cambridge.
| | Æthelflaed; Æthelred I.; Æthelstan; Æthelweard. |
| A. M. C. | Agnes Mary Clerke- See the biographical article: Clerke, Agnes Mary
| | Algol. |
| A. M. Cl. | Agnes Muriel Clay (Mrs Edward Wilde).- Late Resident Tutor of Lady Margaret Hall, Oxford. Joint-editor of Sources of Roman History, 133–70 B.C.
| | Agrarian Laws (in part). |
| A. R. W. | Alfred Russel Wallace, LL.D., D.C.L., F.R.S.- See the biographical article: Wallace, Alfred Russel
| | Acclimatization. |
| A. Si. | Arthur Sidgwick, M.A. LL.D. (Glasgow).- Fellow of Corpus Christi College, Oxford; formerly Reader in Greek, Oxford University.
| | Aeschylus. |
| A. W.* | Arthur Willey, D.Sc., F.R.S.- Director of Colombo Museum, Ceylon.
| | Amphioxus. |
| A. W. H.* | Arthur William Holland- Formerly Scholar of St John’s College, Oxford. Bacon Scholar of Gray’s Inn, 1900.
| | Aberdeen, 4th Earl of. |
| B. M.* | Budgett Meakin (d. 1906).- Author of The Moors ; The Land of the Moors ; The Moorish Empire; &c.
| | Almohades (in part); Almoravides (in part). |
| C. B.* | Charles Bémont, D. ès L., Litt.D. (Oxon.).- See the biographical article: Bémont, C.
| | Agenais. |
| C. E.* | Charles Everitt, M.A., F.C.S., F.G.S., F.R.A.S.- Magdalen College, Oxford.
| | Algebra: History. |
| C. F. A. | Charles Francis Atkinson- Formerly Scholar of Queen’s College, Oxford. Captain, 1st City of London (Royal Fusiliers). Author of The Wilderness and Cold Harbour.
| | Alexandria: Battle;
American Civil War; Ammunition (in part). |