ESRI abbreviates the name of Environmental Systems Research Institute, Inc.. ESRI is a software development firm based in Redlands, California. ESRI is the largest producer of Geographic Information System software in the World with large offices in both the U.S. and UK and smaller offices elsewhere. ESRI was founded in 1969.
Many users pronounce the acronym name of the company as a word; however, employees at the company do not. In 2002 all employees of the company began to clearly pronounce the letters and are known to correct others pronouncing ESRI as a word.
