High Quality Content by WIKIPEDIA articles! STEM fields is a US Government acronym for the fields of study in the categories of science, technology, engineering, and mathematics. The acronym is in use regarding access to work visas for immigrants who are skilled in these fields. Maintaining a citizenry that is well versed in the STEM fields is a key portion of the public education agenda of the United States. Substantial lobbying is underway in Washington, DC to raise awareness of STEM education issues.