Traditional Culture Encyclopedia - Tourist attractions - What is the full name of WTC World Tourism Organization?

What is the full name of WTC World Tourism Organization?

WTC (World Trade Center, United States World Trade Center)

WTO (World Tourism Organization, World Trade Organization)

WTS (Wideband Telemetry Subsystem Broadband Telemetry Subsystem)

WT (Wireless Telegraphy [Telephone] Wireless Telegraphy [Telephone])