- Kaspersky Total Space Security
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- Kate
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- Kate Devlin
- Katherine (Kathy) Anne Yelick
- Katherine L. Morse
- Katherine Sohn
- Kathleen (Kathe) Spracklen
- Kathleen (Kay) McNulty Mauchly Antonelli
- Kathleen Booth (née Britten)
- KAVI Software, Inc.
- Kay Brossard Magleby
- Kayako
- Kaybus Inc.
- Kaygen, Inc.
- Kaypro "New 2"
- Kaypro 1
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- Kaypro Corporation
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- KBTS Technologies, Inc.
- KCP Co Ltd
- KDE
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- Keane Inc
- Kedia Infotech Ltd.
- Keen High Technologies Ltd
- Keen Technology Consulting
- Keith Brown
- Keith Lonsdale
- Keith Uncapher
- Kelaroo
- Kellton Tech Solutions Limited
- KellyMitchell Group.
- KEMA
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- Ken Coar
- Ken E. Batcher
- Ken Howery
- Ken Kutaragi
- Ken Olsen and his once-great company
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- Ken Segall at CHM: The Obsession That Drives Apple's Success
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- Ken Thompson
- Ken W. Kolence
- Kendall Square Research
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- Kenneth (Ken) H. Perlin
- Kenneth (Ken) Levy
- Kenneth (Ken) R. Jacobs
- Kenneth Eugene Iverson
- Kenneth Harry Olsen
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- Kenneth Ross
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- Kentico Software
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- Kerridge Commercial Systems Limited
- Kerrie L. Holley
- Kerry Packer
- Kerry Packer
- Kesav Vithal Nori
- Kesha Shah
- Keste
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- KEV Group
- Kevin A. Stoodley
- Kevin Bowyer
- Kevin Fizz
- Kevin Mitnick
- Kevin Mitnick
- Kevin OLeary
- Kevin Warwick
- Kewill
- Key Information Systems, Inc.
- Key Methods, LLC
- Key Software
- Key Tronic EMS
- Key-Soft Plc
- Keyboard Launchpad
- KeyCDN