Personal Systems Reference (PSREF) sheets, commonly known as the “Dodson sheets”, reveal product features on Lenovo Products. There are separate books on current ThinkPad notebooks, ThinkCentre desktops, ThinkStation workstations, IdeaPad notebooks, IdeaCentre desktops, ThinkVision monitors and withdrawn systems. The PSREF sheets provide comprehensive information on the features and technical specifications of these products.

Memory removal and installation - ThinkPad T61