What is the full name, member countries, and aims of the SSTF organization established in the 1950s as a Cold War alliance?

For the organization "SSTF":

• Full name: There is no widely recognized international organization with the acronym SSTF that was established in the 1950s in the context of major Cold War alliances.
• Member countries: Not applicable, as no such major organization is widely recognized.
• Aims: Not applicable, as no such major organization is widely recognized.

It is possible that "SSTF" is a typo, refers to a very specific or regional entity not commonly associated with the major international organizations of the 1950s, or is an acronym from a different field.