Lenovo been produced and sold by Lenovo since 2005. ThinkCentre computers typically include mid-range to high-end processors, options for discrete graphics cards, and multi-monitor support. Similar to the ThinkPad line of computers, there have been budget lines of ThinkCentre branded computers in the past. Some examples of this include: M55e series, A50 series, M72 series. These "budget" lines are typically "thin clients" however. The ThinkServer product line began with the TS100 from Lenovo. The server was developed under agreement with IBM, by which Lenovo would produce single-socket and dual-socket servers based on IBM's xSeries technology. An additional feature of the server
ThinkPad Enderle said that the constant thing about ThinkPad is that the "brand stands for quality" and that "they build the best keyboard in the business." The ThinkPad X Tablet-series was PC Magazine Editor's Choice for tablet PCs. The ThinkPad X60s was ranked number one in ultraportable laptops by PC World. It lasted 8 hours and 21 minutes on a single charge with its 8-cell battery. The Lenovo ThinkPad X60s Series is on PC World's Top 100 Products of 2006. The 2005 PC World Reliability and Service survey ranked ThinkPad products ahead of all other brands for reliability. In the 2004