Organizations
- SAGE (organization), a professional organization for IT system administrators
- SAGE Publications, an academic publishing company
- Services & Advocacy for GLBT Elders (SAGE), a non-profit organization dedicated to improving the lives of LGBT older adults
- The Sage Colleges, a private educational institution located in New York
- Sage Group, producers of software (especially accounting software)
- Sage Telecom, a U.S. telecommunications company
- SAGE Computer Technology, former name of a U.S. computer manufacturer, later named "Stride Computers"
- Sage Electronic Engineering, LLC, software developer and circuit board designer, associated with the coreboot and Eclipse open-source projects
- Sage SA, a software publishing company for banking and finance industries
- SAGE-AU, an Australian professional association of system administrators
- The Sage Gateshead, a centre for musical education, performance and conferences
- Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), a professional organization for minimally invasive surgeons
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