| Abbreviation | Definition |
|---|---|
| HYBR | Hybrid Networks, Inc. |
| HYDI | Hydromer, Inc. |
| HYII | Hydromaid International, Inc. |
| HYMX | Hymedix, Inc. |
| HYPD | Hyperdynamics Corporation |
| HYPR | HyperFeed Technologies, Inc. |
| HYSL | Hyperion Solutions Corporation |
| HYSNY | Hysan Development Company |
| HYSQ | Hyseq, Inc. |
| HYTDL | Decs Trust IV |
| HZFS | Horizon Financial Services Corporation |
| IAAC | International Asset Holding |
| IAAI | Insurance Auto Auctions, Inc. |
| IAAPF | Iona Appliances, Inc. |
| IABS | International Absorbents |
| IACH | Information Architects Corporation |
| IACQ | Initial Acquisition Corporation |
| IACQU | Initial Acquisition Corporation |
| IACQW | Initial Acquisition Corporation Warrants |
| IACQZ | Initial Acquisition Corporation |