| Abbreviation | Definition |
|---|---|
| APHT | Aphton Corporation |
| APHWE | Apple Homes Corporation Warrants |
| APIHY | Applied International Holdings, LTD. |
| APII | Action Products International, Inc. |
| APLN | APlan.Inc |
| APLX | Applix, Inc. |
| APMC | Applied Microsystems Corporation |
| APNT | Appnet, Inc. |
| APOG | Apogee Enterprises, Inc. |
| APOL | Apollo Group, Inc. |
| APOS | Advanced Polymer Systems, Inc. |
| APPB | Applebees International, Inc. |
| APPG | Appian Technology, Inc. |
| APPI | Advanced Plant Pharmaceutucals, Inc. |
| APPL | Apple Computer, Inc. |
| APPWM | Appalachian Power Company |
| APQCF | Asia Pacific Resources, LTD. (de-listed) |
| APRCP | Alabama Power Company Preferred |
| APRDM | Alabama Power Company |
| APRDO | Alabama Power Company |