| Alden, John | Photographs (company) | Drama (Shakespeare) | 1920s - 1950s |
| Almost Managing Company | Books, photographs, production files, props, scripts, writers files | Theatre | 1970s - 1980s |
| Amateur Theatre Companies | Awards, photographs, programmes, scrapbook | Theatre | - 1995 |
| Andrewartha, Olive & Frank | Certificates, objects, photographs | Site History/ Wirth’s Roller Skating Palais | 1931 - 1943 |
| Angell, Barbara | Costumes, Music arrangements, news clippings, objects, photographs, programmes, scrapbooks | Vaudeville | 1949 - 1971 |
| Anthill Theatre | Photographs, promotional material | Theatre | 1970s - 1990s |
| Asche, Oscar & Brayton, Lily | Business records, correspondence, magazines news clippings | Drama/Musical | 1871 - 1974 |
| Australian Association of Theatre Technicians | Programmes, theatre plan book | Theatre | 1927 - 1959 |
| Australian Children Theatre | Awards, flyers, news clippings, photographs, programmes, scrapbooks, scripts | Theatre | 1930s - 1970s |
| Australian Performing Group | Documents, flyers, newsletters, photographs, programmes, scripts | Theatre | 1960s - 1980s |