TSU is a TLA that can mean several things:

*Taiwan Solidarity Union *Tarleton State University *Texas Southern University *Tennessee State University *Tri-State University *Tulsa-Sapulpa Union Railway

Search Engine Augmentation (recently published contemporary usages): *Tsushima Islands aka Tsu Shima and Tsu-Shima *References to the great Naval Battle of Tsushima, aka. Battle of Tsu-Shima, Battle of Tsu Shima *Tsu Shima Strait ---- see Tsushima Strait *Tsu-Shima Strait ---- see Tsushima Strait