ICCPLATFORMSIGNATURE

typedef enum 
{ 
   NoPlatformSignature = 0x00000000L,   /* No Platform Signature */ 
   MacintoshSignature = 0x4150504CL,   /* 'APPL' */ 
   MicrosoftSignature = 0x4D534654L,   /* 'MSFT' */ 
   SolarisSignature = 0x53554E57L,    /* 'SUNW' */ 
   SGISignature = 0x53474920L     /* 'SGI ' */ 
} ICCPLATFORMSIGNATURE;