Celestina Warbeck

Shuttle students to and from Hogwarts and first began service after the enactment of the International Statute of Secrecy.

Before the statute was put in place, students employed all manner of ways of reaching the school including broomstick enchanted carriage and apparition the support keys which continued for a time after the statute was passed proved to be a logistical nightmare that would fill the hospital wing with six students prompting the ministry to find a safer less chaotic means of transport a stack of paperwork a humongous concealment charm and 167 memory charms later the government acquired a muggle steam engine they then modified according to their needs although for whatever reason they neglected to make it fully automated and have it be a self-driving train radios the muggle device for listening to news and music are also used by wizards The Weasleys keep a radio in their home next to the kitchen sink that plays Celestina Warbeck tunes during Christmas.

Radios are also used to spread information during the war when many wizards who oppose Voldemort go on the run.

Potterwatch, which we'll get to later, mind you.