| Acronym | Definition |
|---|
| NCSL | National Conference of State Legislatures |
| NCSL | National College for School Leadership |
| NCSL | National Computer Systems Laboratory |
| NCSL | National Conference of Standards Laboratories |
| NCSL | National Capital Soccer League (Washington, DC) |
| NCSL | National Conference on Student Leadership (now National Center for Student Leadership) |
| NCSL | National Center for Student Leadership (formerly National Conference on Student Leadership) |
| NCSL | National Council of State Legislators |
| NCSL | National Computer Systems Laboratory (NIST) |
| NCSL | North Carolina Student Legislature |
| NCSL | Naval Code and Signal Laboratory (US Navy) |
| NCSL | Non Commentary Source Lines |
| NCSL | Naval Coastal Systems Laboratory |
| NCSL | National Center for Summer Learning (Johns Hopkins University; Baltimore, MD) |
| NCSL | Nashville Center for Spiritual Living (Nashville, TN) |
| NCSL | National Computer Security Laboratory |
| NCSL | Neighborhood Children's Sports League (Milwaukee, WI) |