The Lenovo ThinkPad STACK is a product difficult to define, but it is clear that it is a useful adjunct for laptops. Rarely laptop running just you alone, especially when in the office. Some people prefer to improve the quality of sound from small speakers built into the computer by adding more powerful external. Others require extra storage, either because the internal hard disk portable machine falls short, or just want to stay quiet doing backups on a daily basis. At other times, what is needed is to expand the connectivity of the laptop, which has been somewhat limited, for example,