| Prefix | Organization | Purpose | Web Site | Contact | Registered |
|---|---|---|---|---|---|
| W2 | WeldonWare Labs | WACed - WeldonWare Advanced Co | www.WeldonWare.COM | Frank W. Fulton Jr. | 29-Sep-1999 |
| WAI | Baltic Solutions formerly WAISS Systems | WAISS components | www.balticsolutions.net/ | Motty Adler | 19-Mar-1999 |
| WB | David Weisbrod | Reserved; Reserved | www.macrosysinc.com | David Weisbrod | 30-Dec-1998 |
| WC | WebCob | In development | www.webcob.com | Mitch Cant | 25-Nov-1999 |
| WCD | Fredric Rylander | Reserved | Fredric Rylander | 21-Aug-1999 | |
| WCE | WebCob Enterprises | In development | www.webcob.com | Mitch Cant | 25-Nov-1999 |
| WCL | WREN Computing Ltd | Mutiple In House Components | Andy Rennison | 14-May-1999 | |
| WD | 3WD Ltd. | PC-Service, Web-Service | www.3wd.de | Frank Sypplie | 19-Mar-2000 |
| wdx | WDosX component suite | Immo Wache | 20-Apr-2000 | ||
| wh | HREF Tools Corp. | WebHub components | www.href.com/whvcl | Ann Lynnworth | 12-Dec-2008 |
| WIM | Reserved | Wim Meyvaert | 09-Jun-2000 | ||
| WIN | (misc) | Melle Slotema | 26-Jul-2000 | ||
| WIZ | Tempest Software | Wizard Tool Kit; Toolkit | www.tempest-sw.com | Ray Lischner | 04-Aug-1998 |
| Wiz | Eyecare Software Ltd | TwizSphEdit | www.eyecaresoftware.co.uk | Dean Smith | 17-Feb-2003 |
| WK | Workload | Touchstone Projects | Andrew Brittle | 24-Feb-2000 | |
| WP | WPCubed | WPTools; Word Processing | www.wpcubed.com/ | Julian Ziersch | 19-May-1998 |
| WP2 | WolfePak, Inc | WolfePak Software internal | www.wolfepak.com | Charles Wolfe | 19-Jul-2006 |
| WPS | WolfePak, Inc | WolfePak Software internal | www.wolfepak.com | Charles Wolfe | 19-Jul-2006 |
| WS | WestSide SoftWare | Reserved | www.westside.nl | Edwin van Driel | 19-Mar-1999 |
| ws | WS Solutions | WS Packages | Frank Wang | 15-Sep-1999 | |
| ws | WaggleSoft | In Development | www.wagglesoft.com | Karen Hill | 03-Jun-2006 |
| wsg | Wippermann Software GmbH | www.wippermann.de/pub:index_login | Thomas Hellmann | 19-Jun-2000 | |
| WvN | ARS Traffic and Transport Technology | Various | www.ars.nl | Wim van Nifterick | 03-Sep-2007 |
| WVW | Ward van Wanrooij | Reserved; Reserved | www.ward.nu | Ward van Wanrooij | 05-Jun-1998 |
| WW | Woll2Woll Software | Infopower; DataControl | www.woll2woll.com | 30-Dec-1899 | |
| wx | BrainWare Software | WrapX | www.wrapx.suite.dk | Christian Iversen | 07-Jan-2000 |
| wy | Private | WY LIB | wpristia.blogspot.com | William Pristia | 23-Dec-2008 |
| WYV | Wyvern Technology, Inc. | Reserved; Reserved | www.wf1b.com | Ray Ortgiesen | 01-Feb-1999 |