Using the -a/--all flag will print all the available information about the kernel.
$uname -a
Linux hostname 3.13.0-88-generic #135-Ubuntu SMP Wed Jun 8 21:10:42 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
In this example, we see the kernel name, the hostname, the kernel release number, the kernel version, the machine hardware name, the processor type, the hardware platform , and the operating system name.
Any of those fields can be queried individually using other flags.