512MB Memory RAM Upgrade for the Lenovo ThinkPad R50, R51, T42 Laptops | eBay
Lenovo IBM ThinkPad R50e Intel Pentium M Processor 1.50GHz 256MB Windows | eBay
CMS 2GB (2X1GB) DDR1 2700 333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with IBM Lenovo® Thinkpad R50E Notebook Series Ddr1-Pc2700 - A49 at Amazon.com
Lenovo IBM ThinkPad R50e Intel Pentium M Processor 1.50GHz 256MB Windows | eBay
OFFTEK 1GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad R50e (1834-xxx) (PC2700) Laptop Memory at Amazon.com
256MB RAM Memory for IBM ThinkPad R50e Series (Type 1842) Black Diamond Memory Module DDR SO-DIMM 200pin PC2700 333MHz Upgrade - Newegg.com
Upgrading to a Faster Hard Drive in a ThinkPad R51 - YouTube