A laptop orchestra (lork or LO) or laptop ensemble (LE) is a chamber music ensemble consisting primarily of laptops. Education based laptop orchestras include BLOrk (University of Colorado Boulder Laptop Orchestra), (Concordia Laptop Orchestra), CMLO (CMU Laptop Orchestra, Carnegie Mellon), HELO (Huddersfield Experimental Laptop Orchestra), (Virginia Tech Linux Laptop Orchestra) OLO (Oslo Laptop Orchestra), (Princeton Laptop Orchestra), SLOrk (Stanford Laptop Orchestra), SAMPLE (Portland State University Sonic Arts and Music Production Laptop Ensemble), and ELUNM (Ensamble de Laptops de la Universidad Nacional de Música in Peru. City based laptop orchestras include BiLE (Birmingham Laptop Ensemble), and MiLO (Milwaukee Laptop Orchestra).