Generally speaking, servers usually have more memory than desktops and workstations.
less
The memory requirements of the operating systems themselves is almost always lower, so you can, for instance, run modern server software on systems that could not run a modern desktop easily (or at all). However, depending on the systems purpose and its load / traffic, the system may actually require far more memory than any desktop system.
Yes, all processors do require some type of operating system. If not a computerized operating system, then it's a humanly operated system.
Applications require the common services provided by operating systems in order to interact with the hardware.
No. Home computers do not require the higher availability of a real-time operating system. A proper real-time environment is difficult to sustain as a general purpose platform, and thus is more suited to mission-critical tasks instead.
Real-Time
Devices that record precise results require a real-time operating system. This is the same kind of operating system needed for a device hat performs regimented tasks.
require less operating power
No. Single-user operating systems are quite capable of accessing and sending data over a network.
The only operating rooms jobs that may not require schooling or experience would be cleaning. Any time someone is assisting in a surgery, special training is required.
Yes. Some video games require what is called a Real-Time operation system.
what general conditions require airway management