| 3.7Designs | 1 | 1 |
| 30A | 1 | 1 |
| 30Lines | 1 | 1 |
| 316Solutions | 1 | 1 |
| 321Soft | 1 | 2 |
| 3281D | 1 | 1 |
| 32Ns | 1 | 1 |
| 360 | 13 | 14 |
| 360 Web Manager | 1 | 1 |
| 360Class.Jansenhm Project | 1 | 1 |
| 360Fly | 1 | 1 |
| 360Systems | 3 | 3 |
| 360Totalsecurity | 1 | 6 |
| 360Zip | 1 | 1 |
| 3Cfr | 1 | 1 |
| 3Com | 36 | 50 |
| 3Commarketing | 1 | 1 |
| 3Cx | 7 | 35 |
| 3D Cover Carousel Project | 1 | 1 |
| 3D Tag Cloud Project | 1 | 1 |
| 3D-Ftp | 1 | 1 |
| 3D3.Com | 1 | 2 |
| 3Dflipbook | 1 | 3 |
| 3Dftp | 1 | 2 |
| 3Do | 1 | 1 |
| 3Dprint Project | 1 | 2 |
| 3Dprotect | 1 | 1 |
| 3Ds | 13 | 27 |
| 3Dsrc | 1 | 1 |
| 3Ivx | 1 | 2 |
| 3M | 1 | 2 |
| 3Mf | 1 | 1 |
| 3Proxy | 1 | 5 |
| 3R Soft | 1 | 2 |
| 3Rdmill | 1 | 1 |
| 3Reality | 1 | 1 |
| 3Rrr-Btob | 6 | 6 |
| 3S Pocketnet Tech | 1 | 1 |
| 3S-Smart | 1 | 1 |
| 3S-Smart Software Solutions | 1 | 1 |
| 3S-Software | 4 | 14 |
| 3Ssoftware | 1 | 4 |
| 3Ware | 1 | 1 |
| 3Xlogic | 4 | 5 |
| 3Xsocializer Project | 1 | 1 |
