I appreciated the bit about pneumatic tubes. For whatever reason, I have been itching lately to find technical details on modern packet-switched pneumatic tube

I appreciated the bit about pneumatic tubes. For whatever reason, I have been itching lately to find technical details on modern packet-switched pneumatic tube networks [1]. They're still used in hospitals apparently. [1] https://youtu.be/W39qQE5jqWk?t=55s https://youtu.be/W39qQE5jqWk?t=55s