what is 3e in train reservation

In Indian Railways, 3E refers to Third AC Economy class. This is a modernized air-conditioned coach with sleeping berths, similar to 3A coaches, but with three side berths making it a total of 9 berths per compartment. Berths are usually arranged as in 3A, with two tiers across the width and three lengthwise. Bedding is included, but appointments are slightly less well-appointed than in 3A, usually with no reading lights or curtained off gangways. These coaches are introduced recently and are increasing in number, but are present only in a few trains right now.