FIRS
FIRS can indicate a scholarly society focused on financial intermediation, a far‑infrared sauna product, or assorted service and information groups in different sectors.
Miscellaneous
Far Infra Red Sauna
Foothills Information Referral Services
Industry Replacement Set
Falkland Islands Radio Service
Federal Inland Revenue Services
Federal Information Relay Service
Fondation Internationale de Recherche Servier