Difference between Samsung Galaxy J, A, S and Note series

What is the difference between the series of Samsung cell phones:

• Samsung Galaxy J
• Samsung Galaxy A
• Samsung Galaxy S
• Samsung Galaxy Note

The differences are moslty in hardware and price:

Samsung Galaxy J - lower segment smartphones for less demanding users, cheaper devices
Samsung Galaxy A - middle segment smartphones for demanding users, good performance devices
Samsung Galaxy S - higher segment smartphones for highly demanding users, top standard devices
Samsung Galaxy Note - higher segment smartphones for highly demanding users, devices have large screens and touch pens

Samsung has announced, that they will no longer release new models for the Galaxy J series.