- CNF
- Confirmed seat — coach and berth assigned.
- RAC
- Reservation Against Cancellation — two passengers share one full berth as seats; one is upgraded as cancellations free up.
- WL / GNWL
- General waitlist for tickets booked from the train's originating quota stations. Highest confirmation rate among waitlist types.
- RLWL
- Remote Location waitlist for intermediate-station bookings. Smaller pool — confirms only against cancellations from the same RL quota.
- PQWL
- Pooled Quota waitlist shared across short-distance segments. Lower confirmation odds than GNWL.
- TQWL
- Tatkal waitlist. Rarely confirms after the Tatkal window closes — there is no Tatkal-specific cancellation pool.
- Tatkal
- Premium quota that opens one day before departure: 10:00 IST for AC classes, 11:00 IST for non-AC.
- Premium Tatkal
- Surge-priced Tatkal seats released alongside the regular Tatkal window. Dynamic pricing.
- SL / 3A / 2A / 1A
- Sleeper non-AC / AC 3-tier / AC 2-tier / AC 1st class respectively.
- CC / EC
- AC Chair Car / Executive Chair Car — day-journey seating (Shatabdi, Vande Bharat, Intercity).
- Chart preparation
- The point when IRCTC finalises the passenger manifest — usually about four hours before departure, and again at intermediate stations for second-charting.
- PNR
- Passenger Name Record — the 10-digit booking reference printed on every IRCTC ticket.