| Topic | Relevant Location | Description. |
| ABC | Our | Origins of the ABC's Radio National and Local Radio networks. |
| Aboriginal | Western Australia | Mary Ellen Cuper - first Aboriginal postmistress (New Norcia) |
| Australia | Telegram from Stan Davey to Prime Minister Harold Holt. | |
| Cable to England | Use of numbers of aboriginals in population totals by Colony | |
| Administration | The principle of combining Post & Telegraph Offices | |
| Advertising | Australia | Booklets with sample ornamental telegram forms. |
| Colonial/Australia | Suggestions to advertise on envelopes and forms | |
| Australia | Slogan postmarks promoting telegrams. | |
| Cars and motor oil | 1932 (Chevrolet), 1934 (oil) | |
| Australia | People on board ships in port | |
| Age (of a person) | Australia | Age required to be a Telegraph Messenger. |
| Aerograms | Coastal Radio | Transmitting messages from T.A.A. aircraft. |
| Afghans | Western Australia | Assistance with the Menzies to Lawlers line in the Goldfields. |
| America, U.S. | War | Threat of invasion of Normanville, South Australia during 1860s. |
| Animals | Koalas | Inspecting the telegraph line at Toowoomba. |
| Geese | Knocking over a telegraph pole at Rokewood, Vic. | |
| Antartica | Australia | Telegraphic communications from Antartica. |
| Arnott's Biscuits | New South Wales | Established at Morpeth 13 years before the telegraph opened there. |
| Articles | See Bibliography (from the left hand Site home menu above) for each administration. | |
| Assistance | Western Australia | Instances when telegraph poles and lines were relied on in attempts to save lives. |
| Digging his own grave near the telegraph line from Dundas to Balladonia. | ||
| Atlantic Cable | USA | |
| Auctions | Victoria | Possibly the first auction of a property in Australia using the Telegraph. |
| Australind, S.S. | Western Australia | The ship which carried so much cargo and so many passengers to the Pilbara and Kimberley districts. |
| Aviation | Darwin | The arrival of Ms Amy Johnson and her telegram |
| The arrival in England of James Mollison and his telegram back to Hon. Latham in Australia. | ||
| Wyndham, W.A. | View of Wyndham as an airport held by Charles Kingsford Smith and Charles Ulm. |