A ticket kiosk, counter screens and a now-serving TV board that calls numbers aloud. Any devices in your office, one room code, nothing to install.
Set it up once on one computer, then open this page on every other screen and join with the code: a tablet or touchscreen as the kiosk, each window's PC as a counter, and the TV (a smart TV browser or a laptop on HDMI) as the board.
Room code, for every screen in the office:
Staff key, for counters and settings only. Write it down now. It is shown once, and without it nobody can call numbers or change the room. Keep it away from the kiosk.
On the other screens open cmks-queue.web.app, type the room code and pick what that screen is. Counters ask for the staff key once and remember it on that device.
Counters need the 8-character staff key shown when the room was made. This device remembers it.
This goes straight to the person who built it. What screen were you on, and what did you expect?
It arrived. If you left an email, the reply comes there.