It's one product, sure.
Arguably more important is standard time.
Before the railways towns ran on local-noon time, so the railways and their timetables required time to be synchronized across regions.
Arguably more important is standard time.
Before the railways towns ran on local-noon time, so the railways and their timetables required time to be synchronized across regions.
The benefits and downsides are something that we still experience two centuries later, all thanks to the railways.