| Abbreviation | Definition |
|---|---|
| BTCB | Butte Community Bank of California |
| BTEK | Baltek Corporation |
| BTFC | B T Financial Corporation |
| BTGC | Bio Technology General Corporation |
| BTGCL | Bio Technology General Corporation |
| BTGI | B T G, Inc. |
| BTHS | Benthos, Inc. |
| BTIC | Brunswick Technology, Inc. |
| BTIOF | Battery Technology, Inc. |
| BTLY | Bentley Communications Company |
| BTLYE | Bentley Communications Company |
| BTOB | SierraCities, Inc. |
| BTRK | Advanced Remote Communications |
| BTRN | Biotransplant, Inc. |
| BTRUY | B T R, Ltd. |
| BTSR | Brightstar Information Technology Group |
| BTTA.PK | Boatatopia |
| BTTD.PK | Buttercreme Desserts |
| BTUI | B T U International, Inc. |
| BTWS | Bitwise Designs, Inc. |