As a part of the decennial census, the U. S. Census Bureau conducts a Non-Response Follow-Up (NRFU) operation in an attempt to gather census data from people who did not respond to the mail-out census form. The NRFU operation involve s a face-to-face interview with people who live in non-respondent households.  Essentially, the NRFU contains questions from the self-administered decennial paper form (also known as the “short form”). However, the NRFU question wording sometimes differs slightly from the short form to facilitate interviewer administration. The NRFU is a computer-assisted personal interview (CAPI); it is administered using a handheld computer (HHC). An HHC is an electronic device that collects and stores data much like a CAPI survey would with a laptop, but the HHC is much smaller than a laptop. The HHC contains NRFU questions in both English and Spanish, and interviewers can select the language for the interview and even “toggle” back and forth between languages, if necessary, during an interview.  The interview is relatively short, depending on the number of residents in a household, and it begins at the household level (i.e., it asks questions relevant to the entire household). About mid-way through the interview, the survey switches to person-level questions (i.e., it asks questions about each person who lives in the household). The NRFU interviews range from about 5 to 30 minutes in length and vary by household size.