| Business | Phone |
| Charles I Ecker Bus Training 6751 Columbia Gateway Dr, Columbia 21046 | (410) 772-4282 |
| Computer Carreer Institute 6740 Alexander Bell Dr, Columbia 21046 | (443) 285-0601 |
| Damar Group Ltd 9810 Patuxent Woods Dr # 2, Columbia 21046 | (410) 290-7000 |
| Knowlogy 10320 Little Patuxent Pkwy, Columbia 21044 | (410) 772-8195 |
| Telenix Corp 9194 Red Branch Rd # K, Columbia 21045 | (410) 750-3213 |
| Training Etc 7150 Riverwood Dr, Columbia 21046 | (410) 290-8383 |