A working knowledge of the major hardware and software components of computer systems is necessary for the study of computer science. These topics need not be covered in detail, but they should be addressed as appropriate throughout the course. Students will usually become familiar with some of these elements as they use computers for programming and other applications. Given the tremendous impact that computers and computing have on today’s society, teachers must take care to encourage the development of intelligent and responsible attitudes and behavior regarding the use of computers. References to responsible use of computer systems should be integrated into an AP CS course wherever appropriate, rather than taught as a separate unit. Typical issues include privacy rights; reliability, especially of life-critical applications; viruses and other malicious attacks on computer systems; and intellectual property rights of artists, writers, musicians, and programmers.