Presentation Layer: SAP GUI & NWBC

What are the two forms of SAP NetWeaver Business Client (NWBC)?

What kind of environment does the SAP GUI implement, and what must the user specify when starting it?

What is the difference between entering /n and /o before a transaction code?

What does SAPLOGON do for the user?

Which languages ship with every SAP system, and since when is Unicode supported?

What is the compatibility rule between the SAP GUI release and the SAP system?

How does the SAP GUI use load balancing to connect, and which component picks the instance?

In modern SAP S/4HANA, what replaced NWBC, and how is the classic SAP GUI still reached?

What are the three SAP GUI variants?

Which files does SAPLOGON use to store named connections, and why does that help?