sort by Rank | Alpha
| Possible Meanings | Rank |
| Regional Initiative in Science and Education | **** |
| resolution imaging science experiment | **** |
| Responsible Industry for a Sound Environment | **** |
| Research Initiative for Scientific | **** |
| Research Initiative for Scientific Enhancement | **** |
| Reinforced Impact Safety Evolution | *** |
| Resources in Special Education | *** |
| Rhode Islanders Sponsoring Education | *** |
| Research In Science and Engineering | *** |
| Research Institute for Studies in Education | *** |
| Research Internships in Science and Engineering | *** |
| Research Institute for Sustainable Energy | *** |
| Resources for Involving Scientists in Education | *** |
| Research and Information on State Education | *** |
| Research Institute for Scientists Emeriti | *** |
| Repository of Information Sources | *** |
| Reading in Secondary Education | *** |
| Rio Institute for Senior Education | *** |
| Resident in Service Examination | *** |
| Restructuring for Inclusive School Environments | *** |
| Rural Initiative for the Social Economy | *** |
| Research Initiative on Social Entrepreneurship | *** |
| Richmond Indoor Sports Experience | *** |
| Research in Software Engineering | *** |
| Rural Innovations in Social Economics | *** |
| RFID Integrated Solution Enablement | *** |
| Randomized Instruction Set Emulation | *** |
| River Influences on Shelf | *** |
| Regional Integration for Sustainable Economies | *** |
| Resources for Indispensable Schools and Educators | *** |
| Research Institute for Small Emerging | *** |
| Renewables for Isolated Systems Energy | *** |
| Rural Indiana Strategy for Excellence | *** |
| Reference Information Specifications for Europe | ** |
| rapid imaging spin echo | ** |
| Registro Impianto Stent Endocoronarico | ** |
| Resources to Insure Successful Engineers | ** |
| Rapid Integration of Software Engineering | ** |
| Response Inducing Sustainability Evaluation | ** |
| Rivier Institute for Senior Education | ** |
| Rural Institute for Social Education | ** |
| Reactive Intermediates Student Exchange | ** |
| Regeneration in the South and East | ** |
| Refugee and Immigrant Safety and Empowerment | ** |
| Raffles Institution String Ensemble | ** |
| Research Industrial Software Engineering | ** |
| Rural Initiatives in Sustainability and Empowerment | ** |
| Residential Initiative on the Study of the Environment | ** |
| Reducing Interference and Saving Energy | ** |
| Research Institute of Software Engineering | ** |
| Research Institute of Science and Engineering | ** |
| Research Internships in Science of the Environment | ** |
| Rejoicing in Spiritual Evidence | ** |
| Respecialization in Special Education | ** |
| Resource Information Serving Everyone | ** |
| Resources and Instruction for Staff Excellence | ** |
| Responsible Ilonggos for Sustainable Energy | ** |
| Raising Interest in Science Education | ** |
| Research Institute of Superconductor Electronics | ** |
| Research Interns in Science and Engineering | ** |
| Reliability Improvement of Selected Equipment | ** |
| Residents in Support of Education | ** |
| Respect Integrity Strength and Ethics | ** |
| Refugee and Immigrant Solidarity Education | ** |
| Regional Industry Skills Education | ** |
| Rehabilitation Information Support and Empowerment | ** |
| Research Institute for STEM Education | ** |
| Reliability Improved Selected Equipment | ** |
| Research in Information Systems Excellence | ** |
| Research Infrastructure for Science and Engineering | ** |
| Riding Instruction for Special Equestrians | ** |
| Richmond Information Systems Educators | ** |
| Rescue Initiatives for Science Education | ** |
| Research Information Service for Education | ** |
| Risingville Intercommunity Service Effort | ** |
| Rhode Island Stage Ensemble | ** |
| Richmond Information System Educators | ** |
| Research Into Sandwich Education | ** |
| Rural Inclusive Special Educators | ** |
| Rape Intervention Services and Education | ** |
| Regional Initiative for Southern | ** |
| Renaissance in Science Education | ** |
| Responsibility Initiative Solutions and Empowerment | ** |
| Raising Interest in Science Engineering | ** |
| Refugees in Search of Employment | ** |
| Resources for Indian Student Education | ** |
| Recruitment in Science Education | * |
| Robotic Interactive Space Exploration | * |
| Radiative Inputs from the Sun to the Earth | * |
| Research and Information Services for Education | * |
| Research Initiation Supplement and Enhancement | * |
| Research Involving Student Engineers | * |
| Rights Implementation for Social Emancipation | * |
| Rural Initiative Social Economy | * |
| Racial Intervention Story Exchange | * |
| Raising Interesting in Science and Engineering | * |
| Reading Increases Student Excellence | * |
| Recognizing Immigrant Success and Endeavours | * |
| Recreation Industry Skills Education | * |
| Research Initiative in Software Excellence | * |
| Radio Interferometry for SElenodesy | * |
| Recognizing Issues in Special Education | * |
| Research in Interdisciplinary Science and Engineering | * |
| Research in Supersonic Environment | * |
| Research on Inequality Sexuality and Education | * |
| Rifampin Isoniazid Streptomycin Ethambutol | * |
| Rural Illiteracy Society for Education | * |
| Caring for the elderly in the Information Society Era | * |
| Reaching Incoming Student Enrichment | * |
| Rehabilitation Information System for Employment | * |
| Removing Impediments to Student Education | * |
| Research Insights in Semiarid Ecosystems | * |
| Research Institute for Security Engineering | * |
| Revolutionary Independent Solid Eloquent | * |
| Redesign Innovate Societal Energy | * |
| RAM improvement of selected equipment | * |
| Reglamento Interior de la Secretarfa de Energfa | * |