Old Indian Railways tickets were characterized by tiny holes along their sides, known as sprocket holes, which served a crucial function in the era of dot-matrix printers. Before the advent of modern printing technology, these holes enabled printers to grip and advance the paper accurately. The dot-matrix printers used by Indian Railways printed tickets on continuous sheets of paper, and the sprocket holes allowed small toothed wheels inside the printer to pull the paper through smoothly. This design was vital for maintaining the correct positioning of printed details, such as train numbers, fares, and timings, preventing printing errors that could lead to confusion. As printing technology evolved, dot-matrix printers were gradually replaced by thermal and digital printers, which do not require sprocket-fed paper. Consequently, the tiny holes disappeared from tickets, marking the transition to modern ticketing methods. Today, e-tickets and mobile tickets have largely taken over, but the historical significance of these holes remains a testament to the technology that supported India's railway network for many years.