Indian Railway is known as the Lifeline of our Nation. Banking of our country is based on the railway.It is the fourth largest railway in the world. Indian railway is situated before about 150 years. There are about 1.307 million employees who are working under Indian railway. It has expended in more than 65 kilometer of tracks. Posts in Indian railway according to group A, B, C, and D Group A Posts Group a posts is carried out by UPSC appointed through Civil Service Exam, EngineeringService Exam, and Combined Medical Service Exam.Group B Posts Group B posts link Section Officers Grade upgraded posts from Group C railway employees on deputation basis.Group C Posts Technical and Non-Technical cadre posts like Clerk, Station Master, Ticket Collector, Commercial Apprentice, Traffic Apprentice, Engineering posts (Civil, Mechanical, Electrical, Signal & Telecommunication) etc.Group D Posts Group D posts are available in various disciplines include Trackman, Helper, AssistantPoints Man, sweeper, Gunman, Peon etc. Indian railway services is divided in two parts:1)Gazetted2)Non-Gazettedi)Group Aii)Group Biii)Non-Gazetted -Group C, Group D and Group C&D (workshop staff).Groups are divided on the basis of their working and pay scale.