California
| Company | Category | Area | Address | Web | Contact person | |
| T-SYSTEMS | Vocational Schools | California | 4601 W 3RD ST, SANTA ANA, Orange, California, 92703-3135, USA | - | - | JOSE THOMAS |
| T-SYSTEMS INC | Telephone Companies | California | 425 MARKET ST # 22, SAN FRANCISCO, San Francisco, California, 94105-2406, USA | - | - | - |
| T-SYSTEMS NOVA | Telephone Companies | California | 400 S EL CAMINO REAL, SAN MATEO, San Mateo, California, 94402-1704, USA | - | - | - |