Thunderbolt is an interface standard found on Mac computers and some PCs. The latest version, Thunderbolt 4, competes with USB4 and is fully cross-compatible.
Thunderbolt™
What is Thunderbolt 4? The connectivity standard explained
What Is Thunderbolt 5?
What Is Thunderbolt 4?
What Is Apple's Thunderbolt / USB 4 vs. PC-Windows Thunderbolt 4?
OWC Adds ThunderBolt Ports to More Macs
What Is Thunderbolt 2?
Thunderbolt Technology
What Is Thunderbolt And How Does It Work?