| Rank | Abbreviation | Meaning |
|---|
| ***** | HCLS | Health Care and Life Sciences
| |
| **** | HCLS | Health Care Law Section
| |
| **** | HCLS | High Cost Loop Support
| |
| *** | HCLS | Hardware Compatibility Lists
| |
| *** | HCLS | Heave-Compensated Landing System
| |
| *** | HCLS | Hidalgo County Library System (McAllen, TX)
| |
| *** | HCLS | Holy Cross Lutheran School
| |
| *** | HCLS | Hope and Care for Little Souls
| |
| *** | HCLS | Hernando County Library System (Brooksville, FL)
| |
| ** | HCLS | HART COUNTY LIBRARY SYSTEM
| |
| ** | HCLS | Harrison County Library System (Gulfport, MS)
| |
| ** | HCLS | Hobart Community Legal Service
| |
| ** | HCLS | hairy cell leukemias
| |
| ** | HCLS | Hancock County Library System (Bay Saint Louis, MS)
| |
| ** | HCLS | Health Care Legal Services
| |
| ** | HCLS | Hall County Library System
| |
| * | HCLS | Henry County Library System
| |
| * | HCLS | Highlands County Library System
| |
| * | HCLS | HALIFAX COUNTY LIBRARY SYSTEM
| |
| * | HCLS | Henderson County Livestock Show
| |
| * | HCLS | Howard County Library System
| |
| * | HCLS | Humphreys County Library System (Belzoni, MS)
| |
| * | HCLS | HENDRY COUNTY LIBRARY SYSTEM
| |
| * | HCLS | hill country listing service
| |