Main contributor
- 7 Up16
- A New Life Films1
- A. G. Rigg1
- A. J. Carlson4
- A. T. Carnahan, M.A., B.Ed., Ontario Department of Education1
- A.C. Filters1
- A.C. Sparkplugs1
- A.J. Carlson1
- A.J. Russell1
- A11
- AAA1
- ABC-TV1
- ABFE1
- ACFRE21
- AT&T2
- Aaron Keim1
- Abdul-Mageed, Muhammad1
- Abegunde, Maria Hamilton1
- Abraham & Straus2
- Abraham Ber Birnbaum (1865-1922)1