| 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. |
| America, U.S. | War | Threat of invasion of Normanville, South Australia during 1860s. |
| Animals | Koalas | Inspecting the telegraph line at Toowoomba. |
| Antartica | Australia | Telegraphic communications from Antartica. |
| Articles | See Bibliography (from the left hand Site home menu above) for each administration. | |
| Aviation | Darwin | The arrival of Ms Amy Johnson. |