| Prefix | Organization | Purpose | Web Site | Contact | Registered |
|---|---|---|---|---|---|
| H | Hamish Williams | ThButton; Button | dspace.dial.pipex.com/hamish.williams | Hamish Williams | 01-Feb-1999 |
| hah | Hahn Technology, Inc. | www.hahntech.com | Tom Hahn | 20-Aug-2001 | |
| Hal | pc1024 | THalMacroExpr, THalSimpleExpr | www.gavidia.org | Alirio Gavidia | 01-Jun-2000 |
| HC | Helicon Software Development | Helicon Translator; Translation | www.helicon.co.at | Andreas Prucha | 11-May-1998 |
| HC | aefew | rex | aqfwe.sfe.veqr | ABc | 09-Nov-2004 |
| HCC | helicon software development | Helicon Component Library | www.helicon.co.at | Andreas Prucha | 08-Apr-2002 |
| HCJ | HL Software, Inc | Reserved | www.hlsoftware.com | Hugh C Johnson | 14-Sep-1999 |
| HCL | HC Linear Ltd. | www.linear.hu | 09-Jan-2008 | ||
| HELICON | Helicon Doftware Development | Helicon Transalator; Translation | www.helicon.co.at | Andreas Prucha | 11-May-1998 |
| HF | Hot Fudge | www.CraigMartin.com | Craig Martin | 25-Aug-1999 | |
| hf | Ontologic | hfLib | Howard Flank | 11-Jul-2006 | |
| Hfx | Halifax Components | Marc Scheuner | 19-Jul-2001 | ||
| Hfx | Metro Halifax DUG component se | Marc Scheuner | 07-Aug-2001 | ||
| Hfx | Metro Halifax Delphi User Group | MHDUG Components | groups.yahoo.com/group/metrohalifaxdug | Marc Scheuner / Dave Hackett | 15-Oct-2001 |
| HG | Dot Software | HyperGraphics | www.dotsoftware.co.uk | Dom Jenkins | 04-Jul-2003 |
| HGE | THgeHotKey | Martin Pelletier | 23-Feb-2000 | ||
| hh | ALed | www.hharvey.mtx.net/Win95App.html | Howard Harvey | 13-Jan-2000 | |
| hhf | HHF Innovations | THHFRestorer | members.home.net/hfournier | Henri Fournier | 02-Sep-2004 |
| HHH | Andy Strong | Reserved; System toolkits | Andy Strong | 30-Dec-1998 | |
| HHI | HHI | ThhiDateEdit | www.hernler.com | Hannes Hernler | 07-Apr-1999 |
| HHS | Helping Hand Software | www.helpinghandsoftware.com | Dan Ervin | 16-Mar-2000 | |
| HJ | HJH Software | Reserved; Reserved | www.freebyte.com | Henk Hagedoorn | 03-Aug-1998 |
| hk | Hristo Kostov (Runner) | reserved | runner.hit.bg | Hristo Kostov | 09-Nov-2004 |
| HL | Citimap software | Reserved | hlesmana.demon.nl | Heri Lesmana | 21-Jul-1999 |
| HL | Heelana | ThlSkinButton ThlDipSwitch Thl | www.heelana.com | Nick Reinschmidt | 30-Sep-2005 |
| HLC | High-Logic | TUndoAndRedo; Toolkit | Erwin Denissen | 01-Feb-1999 | |
| HM | Henrik Mjelve | Reserved; Reserved | home.c2i.net/mjelve | Henrik Mjelve | 01-Feb-1999 |
| HM | Humanic Software | Humanic Suite | www.humanic.com.au | Dean Van Es | 19-Oct-1999 |
| hml | -- | HelpMaker Lite | helpmaker.hypermart.net/ | Peck Kim Han | 12-Dec-1999 |
| hms | High Mountain Software | hmsLogFile | www.hms.com | Chris Stone, MCSE | 31-Jan-2000 |
| Hol | Holroyd | Holspin | www.holroyd.com | Tim Heenan | 01-Feb-2000 |
| HQ | HQ Software | reserved | www.vii.com/~danej | Dane Johnson | 29-Apr-1999 |
| HR | Hayden-R Ltd | Various Reserved; Reserved | www.haydenr.com | Colin A Ridgewell | 11-Jul-1998 |
| HS | Håvard Standal | Reserved; Reserved | Håvard Standal | 30-Dec-1998 | |
| HS | Team Soft SRL | Host Surfer Active Components | www.teamsoft.com.ar/devarea | Gustavo Ricardi | 19-Feb-2000 |
| HSE | Hornstra Software Engineering | reserved | hse.hornstra.com | Ritsaert Hornstra | 29-Oct-1999 |
| HSS | Harris Software Systems | Reserved | Roger Harris | 10-May-1999 | |
| HT | HREF Tools Corp. | some WebHub units; in-house HREF Tools component classes | www.href.com | Ann Lynnworth | 02-May-1998 |
| HT | Heaventools Software | Heaventools components | www.heaventools.com | Yuri Rai | 13-Dec-2001 |
| HTI | Healthware Technologies Inc. | Reserved; Reserved | www.healthware.on.ca | Mike Donnelly | 19-Mar-1999 |
| hti | Hahn Technology, Inc. | www.hahntech.com | Tom Hahn | 19-Aug-2001 | |
| HV | Reserved | www.balder.no | Hallvard Vassbotn | 20-May-1999 | |
| HW | HireWare Limited | Various VCL Enhancements | Ian A Turner | 27-Aug-1999 | |
| HWK | Andreas Gortsilas | Reserved; Component Develop | agorts.hypermart.net | Andreas Gortsilas | 19-Mar-1999 |
| HYM | HELIO YAGO, S.L. | Reserved; Reserved | www.bogamari.com | Helio Yago Mateu | 19-Mar-1999 |
| HZ | Micro System Solutions | 2001 | Fred C. Hill | 28-Jun-1999 |