-
IRS (IT) – Indian Revenue Service (Income Tax)
-
IRS (C&CE) – Indian Revenue Service (Customs & Central Excise)
-
IA&AS – Indian Audit and Accounts Service
-
ICAS – Indian Civil Accounts Service
-
IDAS – Indian Defence Accounts Service
-
IDES – Indian Defence Estates Service
-
ICLS – Indian Corporate Law Service
-
IPoS – Indian Postal Service
-
IRPS – Indian Railway Personnel Service (merged into IRMS from 2023)
-
IRTS – Indian Railway Traffic Service (merged into IRMS)
-
ITS – Indian Trade Service
-
IAAS – Indian Accounts and Audit Service (often clubbed with IA&AS)
-
ISS – Indian Statistical Service (recruited through separate UPSC exam)
-
IESS – Indian Economic Service (recruited through separate UPSC exam)