| Abbreviation | Definition |
|---|---|
| IWT | International Wireless Technologies, L.L.C. |
| IWT | Interop Wireless Technologies |
| IWX | IWX Motor Freight |
| IWZ | InterWize |
| IXC | Interpid Xylophone Company |
| IXI | Innovative Exchange Inc |
| IXOG | Index Oil and Gas, Inc. |
| IYG | Ito Yokado Group |
| IYXI | Inyx Pharmaceuticals, Inc. |
| IZE | International Zoological Expeditions, Inc. |
| IZNN | Izon Network, Inc. |
| J | Junkyard |
| J&A | Jacobson & Associates, L.L.C. |
| J&A | Jacobson & Associates, LLC. |
| J&A | Jaekel & Associates, LTD. |
| J&A | Jindal & Associates (Management Consultants) Pvt., Ltd. |
| JA | Johnson Automatics |
| JABC | Just Another Button Company |
| JAC | Jackson Arthritis Center |
| JAC | Jens Automobile Company |