Moving away from decades of machine-centric computing and making pervasive human-centric computing, the new wave of computing, a reality revolutionizes the relationship between humans and computing systems. There is a growing interest in the use of context-awareness as a technique for developing pervasive computing applications that are flexible, adaptable, and capable of acting autonomously on behalf of users The software challenges to turn such pervasive or ubiquitous computing environments into reality are enormous In this paper, we review some of the challenges of software engineering in pervasive computing.