LSR
- Freedom of Russia Legion
- HaShminiya
- Huntingdon Life Sciences
- LSR (sniper rifle)
- LSR Group
- Label switch router
- Lady Shri Ram College for Women
- Land speed record
- League for Social Reconstruction
- League for Socialist Reconstruction
- Leeds Student Radio
- Lego Stunt Rally
- Liberdade, Socialismo e Revolução
- LifeRing Secular Recovery
- Link state request
- Link-state routing protocol
- Linux Screen Reader
- Lipolysis-stimulated lipoprotein receptor
- Local standard of rest
- Local storm report
- Loose Source Routing
- OSPF