Lowes and home depot come to mind. Their POS/terminals are just a terminal into an TUI. John Deere, kabota and other ag equipment service & parts providers still largely use a TUI.
I'm not positive whether Target's system from ~15 years ago was a TUI, but a friend worked there in college. He mentioned the process for tax exempt purchases was a bit challenging/not the most common. There were some frequent shoppers who had heard the assistance from the manager enough times, they could walk an employee through what buttons to press to get it setup correctly.
vablings|3 months ago
DavidPeiffer|3 months ago