Which country uses TT dollars?

Could you please clarify which country utilizes TT dollars as a form of currency? I'm curious to know if this is a widely recognized or perhaps a more niche form of money in a specific region. Additionally, is there any historical context or economic factors that have contributed to the adoption of TT dollars in this country? Understanding the usage and significance of TT dollars in a particular nation would provide valuable insights into its financial system and global economic position.