| SIGMA | Society of Independent Gasoline Marketers of America | 美国独立汽油销售商协会 |
| SIGMA | Sealed Insulating Glass Manufacturers Association | 密封绝缘玻璃制造商协会 |
| SIGMA | Special Interest Group on Multimedia/Medical Applications | 特殊利益集团在多媒体/医学应用 |
| SIGMA | Support for Improvement in Governance and Management (EU, OECD) | 支持改善治理和管理（欧盟、经合组织） |
| SIGMA | Strategic Information for Global Markets in Agrochemicals | 全球农药市场战略信息 |
| SIGMA | Simulation Guided Memory Analyzer | 模拟引导内存分析器 |
| SIGMA | Software Industrialized Generator & Maintenance Aids | 软件产业化发电机和维修艾滋病 |
| SIGMA | Sediment Identification for Geotechnics by Marine Acoustics | 海洋声学用于岩土工程的沉积物识别 |
| SIGMA | Site Information Generation & Materiel Accountability Plan | 网站信息的生成及物料问责的计划 |
| SIGMA | Student Information & Grades Management Application (University of British Columbia; Vancouver, BC, Canada) | 学生成绩管理中的应用及信息(英国哥伦比亚大学、加拿大温哥华) |
| SIGMA | Gas-Particle Interactions in a Microgravity Flow Cell | 微重力流动室中的气-颗粒相互作用 |
| SIGMA | Sequential Information Gathering in Machines and Animals | 机器和动物的顺序信息收集 |
| SIGMA | System For Integrated Generalised Modelling Analysis | 综合综合建模分析系统 |
| SIGMA | Sustainability Integrated Guidelines for Management and Associates | 管理层和员工可持续发展综合指南 |