ATK may refer to:
Companies
edit- Alliant Techsystems, an American aerospace, defense, and sporting goods company, now part of Northrop Grumman
- ATK motorcycles, an off-road motorcycle manufacturer
- A.T. Kearney, a management consulting firm
- ATK Thiokol, or ATK Launch Systems Group, former names of Thiokol, an aerospace, defense and commercial products company, later part of Orbital ATK
Software
edit- Accessibility Toolkit, a GNOME API for developing accessible applications
- Andrew Toolkit, part of the Andrew Project used to create and distribute documents
- Atomistix ToolKit, software for atomic-scale modeling
Sports
edit- ATK (football club), Indian football club active from 2014 to 2020
Other uses
edit- Arachidonyl trifluoromethyl ketone, an analog of arachidonic acid
- Aboriginal traditional knowledge, cultural knowledge of aboriginal peoples
- America's Test Kitchen, a cooking show on PBS
- Arbetstidsförkortning, a system of additional leave entitlement in Sweden
- Atqasuk Edward Burnell Sr. Memorial Airport, Atqasuk, Alaska (IATA Code: ATK)
- Bruton's tyrosine kinase, a protein
- Kiribati Grand Order (Ana Tokabeti Kiribati, post-nominals: ATK)
