- 3Dsellers
- 3DShook
- 3DSignals
- 3dsignia
- 3DSIM
- 3DSoC
- 3Dsolve
- 3DSP
- 3DT
- 3DTAC Technologies
- 3DTin
- 3DTL
- 3DTOPO
- 3Dtouchde
- 3DTransform
- 3dTrust
- 3DTupo Media
- 3DUniversum
- 3durak
- 3DV Systems
- 3Dvarius
- 3DVista
- 3Dvisual
- 3DVIX
- 3DVU
- 3DWays
- 3DXchange
- 3DYN
- 3Dynamic Systems
- 3Dynamics
- 3E Company
- 3e Infotech
- 3E Rapid Prototyping
- 3E Technologies & Innovations LLC
- 3e Technologies International, Inc.
- 3e60
- 3EM Power Technologies
- 3esi-Enersight
- 3F
- 3F Digital
- 3FactorIndexing
- 3fbio
- 3FLOZ
- 3Forge
- 3ft9
- 3Funnel
- 3Fusion
- 3G
- 3G Capital Partners
- 3G Chemist
- 3G Datingency
- 3G Install
- 3G Logic Infotech
- 3G Mobile
- 3G Multimedia
- 3Gde
- 3Gear Systems Inc.
- 3gibt
- 3GP Player 2011
- 3GPP
- 3GPP Core Network & Terminals TSG
- 3GUPLOAD
- 3Guppies
- 3GV8 International
- 3GVision
- 3H Technology
- 3i - Debt management business
- 3i Group
- 3i Infocom
- 3i Infotech - Framework Limited
- 3i Infotech Ltd
- 3i People, Inc.
- 3i Systems
- 3i-MIND
- 3iDataScraping
- 3ids
- 3IS
- 3Jam
- 3JTech Co
- 3K Interactive
- 3KeyIt
- 3L Capital
- 3Leaf
- 3Lex Labs
- 3Li Business Solutions
- 3LINKS Technologies, Inc.
- 3LINX
- 3llideas
- 3LM
- 3LOQ Labs
- 3M
- 3M - Identity Management Business
- 3M Electronic Monitoring
- 3M Health Information Systems
- 3M New Ventures
- 3m Security Printing And Systems
- 3M Select
- 3M-Tolling and Automated License Plate Recognition Business
- 3Maps iLoveVitaly prOject