Elmo is an unincorporated community located on U.S. Highway 80 in Kaufman County, Texas. The area was first settled in the 1870s, and its population peaked at approximately 900 in the 1880s. In 2000, Elmo had ninety residents and six businesses. In United States law, a region of land is unincorporated if it is not a part of any municipality. ... US 80 is an east-west United States highway. ... Kaufman County is a county located in the state of Texas. ... Official language(s) See: Languages of Texas Capital Austin Largest city Houston Area  Ranked 2nd  - Total 268,581 sq mi (695,622 km²)  - Width 660 miles (1,065 km)  - Length 790 miles (1,270 km)  - % water 2. ... // Events and Trends Technology The invention of the telephone (1876) by Alexander Graham Bell. ... // Events and Trends Technology Development and commercial production of electric lighting Development and commercial production of gasoline-powered automobile by Karl Benz, Gottlieb Daimler and Maybach First commercial production and sales of phonographs and phonograph recordings. ... This article is about the year 2000. ...