To know the model of the system:

Usually we use to find the version of the OS installed,
by using
# uname -X
# uname -a
# cat /etc/release

But how to identify the model of the machine?
We can use

OK banner
Which returns the model of the system

or

# uname -i


Output:
bash-3.00# uname -i
SUNW,Sun-Fire-280R