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# Anonymous

The following constants are provided by the `NSProcessInfo` class as return values for [`operatingSystem()`](/documentation/Foundation/ProcessInfo/operatingSystem()).

## Topics

### Constants

[`var NSHPUXOperatingSystem: Int`](/documentation/Foundation/NSHPUXOperatingSystem)

Indicates the HP UX operating system.

[`var NSMACHOperatingSystem: Int`](/documentation/Foundation/NSMACHOperatingSystem)

Indicates the macOS operating system.

[`var NSOSF1OperatingSystem: Int`](/documentation/Foundation/NSOSF1OperatingSystem)

Indicates the OSF/1 operating system.

[`var NSSolarisOperatingSystem: Int`](/documentation/Foundation/NSSolarisOperatingSystem)

Indicates the Solaris operating system.

[`var NSSunOSOperatingSystem: Int`](/documentation/Foundation/NSSunOSOperatingSystem)

Indicates the Sun OS operating system.

[`var NSWindows95OperatingSystem: Int`](/documentation/Foundation/NSWindows95OperatingSystem)

Indicates the Windows 95 operating system.

[`var NSWindowsNTOperatingSystem: Int`](/documentation/Foundation/NSWindowsNTOperatingSystem)

Indicates the Windows NT operating system.


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