In the early 1950s, once the Eckert-Mauchly Corporation was sold to Remington Rand Bartik went on to help train on how to program and use the UNIVAC for the first six UNIVACs sold, including the programmers at the United States Census Bureau (first UNIVAC sold) and Atomic Energy Commission. Later, Bartik moved to Philadelphia when her husband, William "Bill" Bartik, took a job with Remington Rand. Unfortunately, due to a company policy at the time about husbands and wives working together, Jean Bartik, was asked to resign from the company. Between 1951 and 1954, prior to her first child's birth, Jean did mostly free-lance programming assignments for John Mauchly and was a helpmate to her husband. Once her son was born, Jean walked away from her career in computing to concentrate on raising a family, during which time she had two other children with her husband. It was sometime during this 1950s period that Bartik began going by the name "Jean" rather than her birth first name "Betty", which is what she had been known as during her ENIAC, UNIVAC and Remington-Rand years.