Input: Relationship: 'be trademark of', Argument/Subject 1: 'playstation', Argument/Subject 2: 'sony computer entertainment'

Answer: PlayStation , PLAYSTATION , PS3 and PSP are registered trademarks of Sony Computer Entertainment Inc. UMD is a trademark of Sony Computer Entertainment Inc. Memory Stick Duo , Memory Stick PRO Duo , ATRAC3 and ATRAC3plus are trademarks of Sony Corporation .Windows Media is either a registered trademark or a trademark of Microsoft Corporation in the United States and/or other countries .