ACIS may refer to:
- ACIS (Alan, Charles, Ian's System), a solid modelling geometric modeling kernel that several CAD packages use
- Advanced CCD Imaging Spectrometer, an instrument on NASA's Chandra X-ray Observatory
- Alberta Climate Information Service, an online weather and climate data portal disseminating current and historical weather data for the Province of Alberta.
- Algoma Central Railway, which has the reporting mark "ACIS"
- Acoustic Control Induction System, a Variable Length Intake Manifold|variable induction system developed by Toyota
- Applied Climate Information System, a software system developed by NOAA's Regional Climate Centers (RCC)
- Acis, a character in Greek mythology
- Acis (plant), a genus of flowering plants
- ACIS (Adenocarcinoma in situ) on pap smear, equal to grade 3 cervical intraepithelial neoplasia
- ACIS, a professional designation for associates of the Institute of Chartered Secretaries and Administrators
|This disambiguation page lists articles associated with the title ACIS.
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