The Legacy Archive for Microwave Background Data Analysis (LAMBDA) is a multi-mission NASA center of expertise for cosmic microwave background radiation research. LAMBDA exists to serve the CMB research community, and the greater cosmological research community. In particular, LAMBDA: develops and maintains data archives develops and maintains data access and analysis tools offers scientific expertise on NASA's CMB missions (MAP and COBE) carries out data-intensive processing of vital importance to NASA's CMB community conducts education and outreach efforts aimed at the general public There is no cost involved in the use of LAMBDA; however, if your research benefits from its use, then we request that you include the following acknowledgement in your publications: "We acknowledge the use of the Legacy Archive for Microwave Background Data Analysis (LAMBDA), part of the High Energy Astrophysics Science Archive Center (HEASARC). HEASARC/LAMBDA is a service of the Astrophysics Science Division at the NASA Goddard Space Flight Center."