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Switching from my ThinkPad X220 to a MacBook Pro late 2011 13″ – Ioannis Karagiorgos blog
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Lenovo ThinkPad X220 Review - StorageReview.com
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ThinkPad X220: ExpressCard 3x USB 3 - YouTube
File:Lenovo x220.jpg - Wikimedia Commons
Lenovo ThinkPad X220 Docking Station Port Replicator USB 3.0 No Keys Dock Only | eBay
Lenovo ThinkPad X220 Review
3-pound ThinkPad has USB 3.0, killer battery life - CNET
Lenovo ThinkPad X220 Review - StorageReview.com
Lenovo 320GB ThinkPad X220 42963MU 12.5" Tablet PC 42963MU B&H
Delock Products 61872 Delock Express Card > 1 x USB 3.0
New Lenovo THINKPAD X220 USB 3.0 Dock Station Port Replicator + AC | eBay