Atchison, Topeka and Santa Fe Railway
The Atchison, Topeka and Santa Fe Railway (reporting mark ATSF), often referred to as the Santa Fe or AT&SF, was one of the largest Class 1 railroads in the United States between 1859 and 1996. The Santa Fe was a pioneer in intermodal freight transport; at various times, it operated an airline, the short-lived Santa Fe Skyway, and the Santa Fe Railroad tugboats.
Source: Wikipedia — Atchison, Topeka and Santa Fe Railway (CC BY-SA 4.0)