| Rank | Abbreviation | Meaning |
|---|
| ***** | HCSI | Hybrid Channel State Information
| |
| ***** | HCSI | Housing and Communal Services Industry
| |
| ***** | HCSI | Household Credit Services, Inc.
| |
| ***** | HCSI | Hughes Communications Services Inc
| |
| ***** | HCSI | Hourly Computer Services Inc
| |
| ***** | HCSI | Harvest Christian School International
| |
| **** | HCSI | Health Care Services Inquiry
| |
| **** | HCSI | Home Country Sports Institutes
| |
| **** | HCSI | Hilson Career Satisfaction Index
| |
| **** | HCSI | HC Securities and Investment
| |
| **** | HCSI | High Concrete Structures, Inc.
| |
| *** | HCSI | Health Care Service Iconography
| |
| *** | HCSI | Hammerly Computer Services Inc
| |
| *** | HCSI | Healthy Corner Store Initiative
| |
| *** | HCSI | Human Computer Sexual Interaction
| |
| *** | HCSI | Health Care Safety Institute
| |
| *** | HCSI | Hudson City Savings Institution
| |
| *** | HCSI | Historic Crime Scene Investigators
| |
| ** | HCSI | Health Care Summer Institute
| |
| ** | HCSI | Hill Country System Internals
| |
| ** | HCSI | Health Care Solutions International
| |
| ** | HCSI | Henderson Construction Services Inc
| |
| ** | HCSI | High Cervical Spine Injuries
| |
| * | HCSI | Health Care-Social Issues
| |
| * | HCSI | History of Costume Southern Illinois
| |