There are "at least 1,000 psychologists today, as compared with less than two dozen some 30 years ago, who devote full time to employment in industry." Their activities are diverse and are discussed under the following major headings: Personnel Selection (Employee selection and assignment, Executive selection, Criterion research); Personnel Development (Appraisal, Employee training, Management development, Counselling); Human Factors in Design (Equipment design, Product design); Productivity; Management; and Miscellaneous. "Psychologists are performing a variety of functions for industry. No one person is engaged in all of these activties."