| IRIS | Bitmap graphics (Silicon Graphics RGB image file) 
| Others |
| IRIS | I Recycle In Sherman
| Others |
| IRIS | I Require Intensive Surveillance
| Others |
| IRIS | ICA Recording ICA Surveillance
| Others |
| IRIS | Ideas Responsibility Initiative And Service
| Others |
| IRIS | Ideas, Responsibility, Initiative, Service
| Others |
| IRIS | Illinois Research Information Service
| Others |
| IRIS | Illinois Researcher Information Service
| Others |
| IRIS | Image Recall Image Storage
| Others |
| IRIS | Image Recognition Integrated Systems
| Others |
| IRIS | Image Retrieval Identification System
| Others |
| IRIS | Imaging of Radicals Interacting with Surfaces
| Others |
| IRIS | Immediate Response Information System
| Others |
| IRIS | Immigration Reception and Information Services
| Others |
| IRIS | Immune Reconstitution Inflammatory Syndrome
| Others |
| IRIS | Immunization Registry Information System
| Others |
| IRIS | Incident Reporting Investigation System
| Others |
| IRIS | Incident Resolution Information System
| Others |
| IRIS | Include Respect I Self
| Others |
| IRIS | Inclusion Respecting Identity and Sexuality
| Others |
| IRIS | Incorporated Research Institutions for Seismology
| Others |
| IRIS | Increasing Retention and Inclusion in STEM
| Others |
| IRIS | Indentification and Referral to Improve Safety
| Others |
| IRIS | Independent Removable Information System
| Others |
| IRIS | Individual Requirements Intelligent Solutions
| Others |
| IRIS | Individuals Respecting Identities and Sexualities
| Others |
| IRIS | Industrial Research Institute Swinburne
| Others |
| IRIS | Industry Resource Internet Supervision
| Others |
| IRIS | Inertia Resonance Induction System
| Others |
| IRIS | Information Regarding Israel Security
| Others |
| IRIS | Information Relayed Instantly From the Source
| Others |
| IRIS | Infrastructure for Resilient Internet Systems
| Others |
| IRIS | Inland Region Iris Society
| Others |
| IRIS | Inland Revenue Information System
| Others |
| IRIS | Innovative Response to Improve Safety
| Others |
| IRIS | Innovative Rheological Interactive Software
| Others |
| IRIS | Innovative, Resourceful, Inspired, and Strategic
| Others |
| IRIS | Inquiry Routing and Information System
| Others |
| IRIS | Institute for Robotics and Intelligence Systems
| Others |
| IRIS | Institutional Research Information Service
| Others |
| IRIS | Institutional Research Information Solution
| Others |
| IRIS | Instruction Research and Information Services
| Others |
| IRIS | Instructional Resource Information System
| Others |
| IRIS | Insurance Regulatory Information System
| Others |
| IRIS | Insurance Regulatory Information Systems
| Others |
| IRIS | Integrated Radiation Information System
| Others |
| IRIS | Integrated Raster Imaging System
| Others |
| IRIS | Integrated Refugee and Immigrant Services
| Others |
| IRIS | Integrated Regional Information System
| Others |
| IRIS | Integrated Registration Information System
| Others |
| IRIS | Integrated Repair Information System
| Others |
| IRIS | Integrated Representative Information System
| Others |
| IRIS | Integrated Resource Information System
| Others |
| IRIS | Integrated Risk Information System
| Others |
| IRIS | Integrated Road Information System
| Others |
| IRIS | Integrated Romanian Information System
| Others |
| IRIS | Integrated Romanian Information Systems
| Others |
| IRIS | Integrated Routing and Intelligent Switching
| Others |
| IRIS | Intelligent Recruiting Information System
| Others |
| IRIS | Intelligent Retinal Imaging Systems
| Others |
| IRIS | Intelligent Roadway Information System
| Others |
| IRIS | Intelligent Room Illumination Sensor
| Others |
| IRIS | Intelligent Rotation In Space
| Others |
| IRIS | Intensified RAM Intelligent Server
| Others |
| IRIS | Inter-Religiousraat In Suriname
| Others |
| IRIS | Interactive Rendering and Image Segmentation
| Others |
| IRIS | Interethnic Relations In Sisterhood
| Others |
| IRIS | Interface Region Imaging Spectrograph
| Others |
| IRIS | Intermodal Routing Information System
| Others |
| IRIS | Intern and Resident Information System
| Others |
| IRIS | Internal Revenue Information Services
| Others |
| IRIS | Internal Rotary Inspection System
| Others |
| IRIS | International Railway Industry Standard
| Others |
| IRIS | International Railways Industry Standard
| Others |
| IRIS | International Reactor Innovative and Secure
| Others |
| IRIS | International Recruitment Investigations in the Subarctic
| Others |
| IRIS | International Regulatory Issues Staff
| Others |
| IRIS | International Renal Interest Society
| Others |
| IRIS | International Repair Information System
| Others |
| IRIS | International Research Institute of Stavanger
| Others |
| IRIS | International Retail Information System
| Others |
| IRIS | Internet Rapid Installer for Software
| Others |
| IRIS | Internet Registry Information Service
| Others |
| IRIS | Internet Research Information Services
| Others |
| IRIS | Intratissue Refractive Index Shaping
| Others |
| IRIS | Iowa Resource for International Service
| Others |
| IRIS | Iraq Resource Information Site
| Others |
| IRIS | It Really Is Simple
| Others |
| IRIS | Italian Research Interim Stage
| Others |
| IRIS | Ivanhoe Reading Intervention Scheme
| Others |