Telephone interviewing performed with the assistance of a computer. CATI systems are similar to CAPI systems in that the questionnaire items are displayed on line and the interviewer enters the respondent's answers with the keyboard or mouse. Most CATI systems perform other operations related to the management or collection of data by telephone. They may, for example, supply the interviewers with instructions, manage the sampling pool, schedule call attempts, record the outcomes of the calling effort, and/ or monitor the progress of the interviewers.