ThinkPad flex, stainless steel hinges, a biometric fingerprint reader, Client Security Solution, which improves security using a built-in Trusted Platform Module (TPM) and facilitates deployment in corporate environment, the ThinkVantage Technologies suite of computer management applications, and drain holes to help reduce damage to the keyboard and components from accidental spillage. The original design concept of ThinkPad was created in 1990 by Italy-based designer Richard Sapper, a corporate design consultant of IBM and, since 2005, Lenovo. Sapper is noted for the design of classic products such as the Tizio lamp for Artemide, office chair for Knoll, kitchenwares for Alessi and ballpoint
ThinkPad W series are: The Lenovo W541 is essentially a ThinkPad W540 that featured the new-style keyboard but with a re-introduction of the classic ThinkPad trackpad design. The prior ThinkPad trackpad design featured in the W540 was abandoned. Rather than being a successor of any previous W-series model, the Lenovo W550s is a thinner Ultrabook variant of the W series. While a capable Ultrabook, when compared to the W541 and its predecessors, it offers less capability with only dual-core hyper-threaded Intel Broadwell Processors vs. the true quad-core processors of other models and has only two RAM slots. The ThinkPad W series was replaced