CMS 4GB (1X4GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Panasonic® Toughbook 31 Mk3 Cf-31 Series Only - A20 at Amazon.com
Amazon.com: OWC 4GB PC8500 DDR3 1066MHz SO-DIMM Memory Compatible with Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, 2009/2010 Mac Mini, and 2009 iMac Models : Everything Else