I was looking at simulink library browser and i noticed something that i am unable to understand. I have attached a snapshot and encircled red and highlighted yellow certain items.
As you can see in attached snap, the top and first blue and yellow highlighted item simulink is also available in Library browser. why it is named like that?
And other categories encircled in red boundary for example aerospace blockset and communication blockset are not under category/heading of simulink. why? Are they not part of main simulink? are they add ons or additional components of simulink?