The services come under three groups

All India Services

» Indian Administrative Service
» Indian Forest Service
» Indian Police Service

Group A Services

» Indian P & T Accounts & Finance Service
» Indian Audit and Accounts Service
» Indian Customs and Central Excise Service
» Indian Defence Accounts Service
» Indian Revenue Service
» Indian Ordnance Factories Service (Assistant Works Manager, non-technical)
» Indian Postal Service
» Indian Civil Accounts Service
» Indian Railway Traffic Service
» Indian Railway Accounts Service
» Indian Railway Personnel Service
» Posts of Assistant Security Officer in Railway Protection Force (RPF)
» Indian Defence Estates Service
» Indian Information Service (Junior Grade)
» Indian Corporate Law Service

Group - B Services

Railway Board Secretariat Service (Section Officer's Grade)
Armed Forces Headquarters Civil Service (Section Officer's Grade)
Delhi, Andaman & Nicobar Islands, Lakshadweep, Daman & Diu and Dadra & Nagar Haveli Civil Service and Police Service
Pondicherry Civil Service