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Railway tickets can also be booked without the Internet, it's the simple way
The railways offer a few different ways of booking tickets; you can book tickets online or at a reservation office. Fairly recently, Indian Railways also launched a scheme where you can book a ticket through SMS, but this is such a complicated process that I will not include it in this tutorial.
There are quite a few websites that allow you to book tickets online, of which IRCTC and Cleartrip are notable. IRCTC, short for "Indian Railway Catering and Tourism Corporation" is the railways' official website to book tickets and its URL Cleartrip, on the other hand, is a private website that aims to simplify the booking process. While it does have its fair share of bugs, it does manage to provide a far less troublesome booking experience than IRCTC.
What is the difference between booking tickets online and booking them at a counter? In the following table, I provide a brief overview of both: