Indian railways have class code designations. The 3A class refers to the AC, or air-conditioned, 3-tier sleeper car. The 3E class refers to the AC 3-tier economy car.
No much difference between first class and first class ac. Only AC is the difference. First class does not have AC.
Victorian Railways J class was created in 1954.
Victorian Railways C class was created in 1918.
Commonweatlh Railways NT class was created in 1965.
Victorian Railways S class was created in 1928.
Palestine Railways P class was created in 1935.
Victorian Railways H class was created in 1941.
Commonwealth Railways NSU class was created in 1954.
Victorian Railways X class was created in 1929.
Victorian Railways B class was created in 1862.
Victorian Railways AA class was created in 1900.
Commonwealth Railways CL class was created in 1970.