| Abbreviation | Definition |
|---|---|
| ADVNA | Advanta Corporation Class A |
| ADVNB | Advanta Corporation Class B |
| ADVP | Advance Paradigm, Inc. |
| ADVR | Advanced Viral Research Corporation |
| ADVS | Advent Software, Inc. |
| ADVVE | Advantage Technologies |
| ADYNF | Andyne Computing, LTD. |
| AEBS | Electronic Business Systems |
| AECC | American Enterprise.Com, Inc. |
| AEDU | American Education Corporation |
| AEHR | A E H R Test Systems |
| AEIS | Advanced Energy Industries, Inc. |
| AENG | Advanced Engine Technologies |
| AEOS | American Eagle Outfitters |
| AEPI | A E P Industries, Inc. |
| AERIE | Allerion, Inc. |
| AERL | Aerial Communications, Inc. |
| AERN | A E R Energy Resources, Inc. |
| AERS | Aero Systems Engineering, Inc. |
| AERTA | Advanced Environmental Recycling Technologies |