| Aaa Security | 410-653-9004 | 5 Suntop Ct | Pikesville | MD | 21209 |
| Ads Systems | 410-792-4090 | 8260 Patuxent Range Rd Ste H | Jessup | MD | 20794 |
| Apelco Marine Electronics | 410-727-0982 | 1124 Light St | Baltimore | MD | 21230 |
| Automatic Operators | 410-633-6509 | 6500 Eastern Ave | Baltimore | MD | 21224 |
| Besam Mid-Atlantic Automatic Entrances Inc | 410-792-2636 | 8725 Bollman Pl | Savage | MD | 20763 |
| Car Sounds | 410-252-1175 | 2066 York Rd | Timonium | MD | 21093 |
| County Car Radio Inc | 410-668-5484 | 7506 Belair Rd | Baltimore | MD | 21236 |
| County Car Radio Inc | 410-760-9545 | 7150 Furnace Branch Rd | Glen Burnie | MD | 21062 |
| Diversified Control Systems Inc | 410-636-6400 | 809 Barkwood Ct | Linthicum Heights | MD | 21225 |
| Irvs Car Radio & Tv Drive In Service | 410-833-6700 | 716 Main St | Reisterstown | MD | 21136 |
| Joppa Lock & Key | 410-665-6100 | 2207 E Joppa Rd | Parkville | MD | 21234 |
| Klein Auto Works Inc | 410-727-4041 | 418 East St | Baltimore | MD | 21202 |
| Lou Storms Auto Sound Ctr | 410-838-1363 | 118 N Tollgate Rd | Bel Air | MD | 21014 |
| M T C | 410-521-1121 | 8711 Liberty Rd | Randallstown | MD | 21133 |
| Rollins Protective Services Co | 410-682-2184 | 9600 Pulaski Park Dr | Baltimore | MD | 21221 |
| Safe & Sound Auto Center | 410-668-1100 | 1755 E Joppa Rd | Baltimore | MD | 21234 |
| Slk Security | 410-658-4349 | 29 Pleasant Dr | Rising Sun | MD | 21911 |
| Tele-Tector Of Maryland Inc | 410-290-5600 | 6935 Oakland Mills Rd | Columbia | MD | 21045 |
| Westminster Speed & Sound | 410-848-1447 | 202 Pennsylvania Ave | Westminster | MD | 21157 |
| Westminster Speed & Sound | 410-876-1227 | 202 Pennsylvania Ave | Westminster | MD | 21157 |
