This report is one in a series about the status and characteristics of the science and engineering populations. Data for the study were generated by a 1970 national survey by the Bureau of the Census and updated in 1972 by the National Science Foundation. Presented in this report are selected economic characteristics of persons defined as engineers or scientists--the occupation in which they were employed, their tenure, and means of acquiring their position. Also shown are their statuses prior to acquiring their job, the tendency to hold a second job, and the basic annual salary in their primary job. A limited number of profiles concerning demographic, education, and economic characteristics are also included. (CP)