A study was undertaken to obtain current information about individuals professionally concerned with linguistics and related fields. The study is based on information from the 1968 questionnaire of the National Register of Scientific and Technical Personnel. Four aspects of the core community are emphasized: (1) academic training: highest degree earned, year of highest degree, degree-granting institution, major subjects, and foreign languages studied; (2) professional characteristics: place of employment, professional identification, employment status, type of employer, work activities, ESL experience, and membership in professional societies; (3) biographic background: place of birth, age and sex; and (4) mobility of the community: geographic distribution of the respondents according to birth, education, and employment. The study is supplemented by numerous tables, graphs, and maps illustrating the data, and a copy of the questionnaire is provided. (Author/AM)