HP ProBook 4520s Intel Core i3 M370 CPU @ 2.40GHz, 4GB RAM, 250GB HDD with Microsoft Windows 10 Professional and Microsoft Office 2010 Home & Business.
A-Tech 8GB (2 x 4GB) RAM for HP PROBOOK 4520S | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com
A-Tech 8GB (2 x 4GB) RAM for HP PROBOOK 4520S | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com
HP ProBook 4520s 15.6 inch Core i3-380M 2GB RAM 320GB HDD DVDRW W7HP Notebook Computer | 4520s