What does DOO Hotel mean?

May refer to the operating instructions.

DOO's full name is DescriptionOfOperation, which may be extended because some hotel equipment needs to be explained.

A hotel has many operating systems, which need corresponding instructions to understand. Here are some examples: login system, exit system, reservation system, reception system, cashier system, audit system, accounts receivable system, housekeeper system, guest calendar system, contract system, report system, search system, trading system, system settings, manager chart and so on.