Clipboards:
NSGeneralPboard
NSFontPboard
NSRulerPboard
NSFindPboard
NSDragPboard

Sources:
NSColorPboardType
NSFileContentsPboardType
NSFilenamesPboardType
NSFontPboardType
NSPDFPboardType
NSPICTPboardType
NSPostScriptPboardType
NSRulerPboardType
NSRTFPboardType
NSRTFDPboardType
NSStringPboardType
NSTabularTextPboardType
NSVCardPboardType
NSTIFFPboardType
NSURLPboardType