In the early days of the railways, technological resources were limited. In the administrative sector, activities were carried out using manual calculators, typewriters, and the telegraph  which was the main means of communication until the late 19th century. With this equipment, railway stations exchanged messages about train traffic, accidents, and other events, ensuring safety and organization during travel.

As technology advanced, the telegraph was replaced by the Telex, a more modern device that enabled network communication between different machines. Later came the fax, the telephone, and computers, making communication within the railway system simpler and faster.