Original sentence: Harrington worked at the US Naval Observatory.Robert Sutton Harrington (October 21 1942 – January 23 1993) was an American astronomer who worked at US Naval Observatory
Edited sentence: Harrington worked at the USNO.Robert Sutton Harrington (October 21 1942 – January 23 1993) was an American astronomer who worked at the United States Naval Observatory (USNO)