Two disciplines have been developed during the past few years for the study of computer software. Software physics has as its purpose the analysis of execution characteristics of programs. Basic measures of software work, time, and shortage occupancy are used to derive measures such as power, capacity usage, and storage work, with applications to the choice of processor and device speeds. Software science is related to information theory. Occurrences of operators and operands in the text of programs are counted to provide measures for a number of relationships; among them are estimates for program length, program and language level, and programming time.