ELR meaning in Community ?

Everybody Loves Raymond is an American sitcom television series created by Philip Rosenthal that aired on CBS from September 13, 1996, to May 16, 2005, with a total of 210 episodes spanning over nine seasons. It was produced by Where's Lunch and Worldwide Pants Incorporated, in association with HBO Independent Productions. The cast members were Ray Romano, Patricia Heaton, Brad Garrett, Doris Roberts, Peter Boyle, Madylin Sweeten, and Monica Horan. Most episodes of the nine-season series were filmed in front of a live studio audience, with a few exceptions.

The series received positive reviews and has been ranked the 49th all-time funniest television comedy by Complex, the 60th best all-time series by TV Guide, the eleventh-best sitcom starring a stand-up comedian and the 35th best sitcom of all time by Rolling Stone, and (alongside South Park) the 63rd best written television series by the Writers Guild of America. In a Hollywood Reporter poll of all-time television programs surveying 779 actors, 365 producers and 268 directors, Everybody Loves Raymond ranked 96th.