A discussion of current trends in aerospace computation. Total U.S. computing power is expected to increase by a factor of 1000 in the next ten years. While computers are becoming faster and more efficient, computer software remains a handicraft industry, custom-made and too frequently idiosyncratic. Programs often subtly distort the projects they are intended to assist. Conversion from one machine to another is time-consuming. Programmers should strive for interchangeability, using machine-independent programming languages and modular units. Continuous reexamination of goals is necessary. (Presented at the SSD/Aerospace Workshop on Spaceborne Computer Software at Aerospace Corporation, El Segundo.).