Name
- Alexander, Harry Head, printer and Secretary of the Chippenham Literary and Scientific Institution, 1811-18421
- Alexander, Richard, watchmaker and bookseller, of Chippenham, fl 18321
- Allen, Stephen, clergyman and tutor, 1813-18891
- Amici, Giovanni Battista, Italian astronomer, botanist and optician, 1786-18631
- Andrew Ross, optical, mathematical and philosophical instrument makers, 1830-18591
- Anglo-American Mining Association, fl 18261
- Anglo-American Telegraph Company Limited, 1866-19471
- Anstie, George Washington, Secretary of the Wiltshire Anti-Slavery Society, 1799-18821
- Anthony, Edward, photographer and merchant, of New York, 1819-18881
- Apps, Alfred, optician and electrical instrument maker, of London, 1839-19131
- Armacks & Striclain, horticultural suppliers, fl 18301
- Arnold, Thomas Kerchever, clergyman, educator and writer, 1800-18531
- Artaria & Fontaine, publishers, Mannheim, 1793-1
- Athenaeum Club, London, 1824-1
- Attwood, Thomas, politician and currency theorist, 1783-18561
- Atwood, Henry Adams Sergison, clergyman, astronomer and author, 1800-18771
- Australian Agricultural Company, 1824-1
- Awdry, Frederick, solicitor, Chippenham, 1817-18841
- Awdry, John Wither, Knight, Chief Justice Bombay Court, 1795-18781
- Awdry, John, solicitor, Reybridge, 1766-18441