ThinkPad is a line of business-oriented laptop computers and tablets initially sold by IBM and now by Lenovo. With compelling overall ergonomic, strong build quality, industry-leading keyboards, hyper-accurate pointing sticks, and simple black aesthetic, ThinkPad has been known as one of the best and most reliable brands for decades. But before buying a ThinkPad laptop, you need to know what series does Lenovo ThinkPad has? Which ThinkPad series is best? Which model is suited for you? Today I will share the complete Thinkpad buying guide with you, including Thinkpad series explanation & comparison. Keep reading, so you can be sure you’re buying the best Thinkpad at very cheap price.