- DnSoft Research Group
- DNV GL AS.
- Do3D
- Doba LLC.
- Dobler Consulting Inc.
- Doc Scrubber
- DOC-IT 3000
- DOC-IT 4000
- Docker, Inc.
- DocSTAR
- Doctor Web, Ltd.
- DocuColor 8080
- DocuColor 8080
- Docudesk
- Doculabs
- DocuLex, Inc.
- Document Foundation, The
- Documentation Strategies, Inc.
- DocuPrint 100MX EPS
- DocuPrint 1050/1050MX
- DocuPrint 115MX EPS
- DocuPrint 135MX EPS
- DocuPrint 155MX EPS
- DocuPrint 180MX EPS
- DocuPrint 525/525MX
- DocuSign
- DocuTech 128 HLC
- DocuTech 155 HLC
- DocuTech 180 HLC
- DocuTech 6115
- DocuTech 6135
- DocuTech 6180
- DoEasier Tech
- DogHouse
- Doghouse systems
- Doist
- Dolbey
- Dolphin Computer Access
- Dolphin Interconnect Solutions
- Dom & Tom
- Domain Computer Services Inc.
- Domain/OS
- DomainTools.com
- Domestic Electronic Digital Computing
- Domino Printing Sciences PLC
- Domintex, Inc.
- Domo
- Don Cassel
- Don Coppersmith
- Don Hammond
- Don HO
- Donald (Don) M. Eigler
- Donald (Don) Nielson
- Donald Becker
- Donald D. Chamberlin
- Donald Ervin Knuth
- Donald F. Ferguson
- Donald J. Haderle
- Donald Lester Bitzer
- Donald Michael Ludlow
- Donald Michie
- Donald Peter Greenberg
- Donald Trump
- Donald Valentine
- Donald W. Marquardt
- Donald Watts Davies
- Dongsoft
- Donn B. Parker
- Donn B. Parker
- Donna Dubinsky
- Donors (Major Gifts)
- Donovan Data Systems
- Doomsday Scenarios-Big Science Discussion @ Computer History Museum (CHM) in Mt View, CA on October 27, 2012
- DOOR3 Business Applications
- doPDF Free PDF Converter
- Dorado
- Dorcas Muthoni
- Doris L. Carver
- Dorothy Du Boisson
- Dorothy Vaughan
- Dorr Eugene Felt
- DOS Plus
- DOS/360
- DOS/VS
- Dot Hill Systems Corp.
- Dotcom-Monitor
- Dotloop
- DotNetNuke Corporation
- dotPDN, LLC
- DotSUB
- Double Image Backup
- Double Prime
- Double Sigma Programming
- Double-Take Software
- Doug Chance
- Doug Coupland
- Doug Gwyn
- Douglas (Doug) Taylor Ross
- Douglas Adams