| SISTER | s In Scripture Teaching Encouraging Relationships 
| Others |
| SISTER | s Influencing Sisters through Encouragement and Respect
| Others |
| SISTER | Sassy Intelligent Smart Talented Elegant Raunchy
| Others |
| SISTER | Sassy, Intelligent, Smart, Talented, Elegant, Raunchy
| Others |
| SISTER | Self Image Support Team and Emotional Resource
| Others |
| SISTER | Sisters In Scripture Teaching Encouraging Relationships
| Others |
| SISTER | Social Information System To Enhance Resources
| Others |
| SISTER | Some Incredibly Stupid Twat Eating Ravioli
| Others |
| SISTER | Soroptimists In Science, Technology, Engineering, and Research
| Others |
| SISTER | Summer Institute in Science Technology Engineering and Research
| Others |
| SISTER | Support for International Science Technology and Engineering Research
| Others |
| SISTER | Supportive Intensive System of Treatment Empowerment and Recovery
| Others |
| SISTER | Supportive, Intelligent, Sweet, Talented , Encouraging, Reliable
| Others |
| SISTER | Symbolic Interactionist Simulation of Trade and Emergent Roles
| Others |
| SISTER | System of Information on Strategies Tasks and the Evaluation of Results
| Others |