Why are logon groups best organized by application area, and are per-instance load limits hard limits?

What is an operation mode, and what can SAP do with it automatically?

What are reserved work processes (rdisp/wp_no_restricted)?

Which OS-specific mechanisms does the Control Panel use to start/stop a remote instance?

Where are operation modes created, and what is the prerequisite?

How is the total number of work processes at instance start calculated, and what is the absolute maximum?

How does logon load balancing distribute users, and where are logon groups maintained?