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 X series 3.20 GHz) with 4 GB of RAM (up to 8 GB), SATA SSD or hard drive, Intel Integrated HD Graphics, USB 3.0, backlit keyboard, 802.11 b/g/n WiFi and an average of eight hours of battery life. The battery is internal and not removable, and there is no optical drive. The ThinkPad X1 laptop was released by Lenovo in May 2011. Notebook Review offered a positive opinion of the ThinkPad X1, saying that it was “A powerful notebook that combines the durability and features of a business-class ThinkPad with the style of a consumer laptop.” A 13.3" X1 ThinkPad was announced