From sorting to stacking to swiping, library assistants keep books, periodicals, and other resource materials organized and easily accessible. Do not let the job title fool you; these professionals are critical in helping libraries, media centers, research facilities, and other information-based organizations run smoothly and effectively. There are approximately 122,000 library assistants working in the United States. Library assistants may also be known as library aides, library technical assistants, media aides, library media assistants, and circulation assistant library clerks.