Oh, yes. The things many (most?) people don't think about which must be available 24/7. Public Safety (Police/Firefighters). The people who tell the Public Safety where there is an immediate need (You!). Electricity itself, so yes, yes. And Hospital, particularly but certainly not exclusively Emergency Departments, Surgery (my own), and Patient Care.
At that, I'm sure I've left something off the list. *G*
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At that, I'm sure I've left something off the list. *G*