| Name | Country | Market Cap (US$) |
|---|
| AuditWare Systems Limited | United Kingdom | Private |
| Audium Corporation | United States | Private |
| Aurema, Inc. | United States | Private |
| Aurum Software, Inc. | United States | Private |
| Austin Computer Enterprises, Inc. | United States | Private |
| Austin Info Systems, Inc. | United States | Private |
| Authentica, Inc. | United States | Private |
| Authentium, Inc. | United States | Private |
| Authoria, Inc. | United States | Private |
| Auto-trol Technology Corporation | United States | Private |
| Autologica Software | Argentina | Private |
| Automated Financial Systems, Inc. | United States | Private |
| Automated Learning Corporation | Canada | Private |
| Automated License Systems, Inc. | United States | Private |
| Automated Logic Corporation | United States | Private |
| Automated Payment Transfer Limited | United Kingdom | Private |
| AutoMind Ltda. | Chile | Private |
| Automsoft | United States | Private |
| AutoSkill International, Inc. | Canada | Private |
| AutoSoft International, Inc. | United States | Private |
|