| Safe Computing |
| - protection of information systems. |
| Sanyo Sanservice |
| - a general distributor and service of Sanyo equipment. |
| Siemens Nixdorf |
| - electronics. |
| SM Wlodarzewska |
| - construction. |
| Soft-tronik Polska |
| - networking products and services. |
| Solidex |
| - authorized reseller of IT systems. |
| Sopot Light & Power |
| - electric company. |
| Suntech |
| - banking systems. |
| SZD Bielsko |
| - producer of dual-purpose single-seat all-composite gliders at affordable price. |