Excerpt - page 31: "one Air Force computer, software development costs were about $75 per instruction. Maintenance cost Requirements Coded Released $4000 per ... "
Excerpt - page 7: " ... computer science is concerned with the theories and methods that under- lie computers and software systems, whereas software engineering is concerned with the practical problems ... "
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Excerpt - page 16: "Software consists of the programs that tell the computer what to do. To do useful work, your system must execute instructions from some program ... some program. There are two major categories of software: system software and application software. System software helps you to manage your files, to load ... "