Constant
Constant specifying the operating system running on and the type of hardware installed in the host machine.
Symbol.
#"x86-win32"
system
operating-system
This constant is a symbol that represents the both the operating system running on, and the type of hardware installed in, the host machine. It is a combination of the $os-name and $machine-name constants.
#"x86-win32", #"alpha-osf3"