The purpose of this study is to understand the importance of personal computers (PCs), new and used, as well as post-consumer management options in the residential sector in developing countries using Peru's capital, Lima, as a case study. Part of this study aims to understand how the growth of secondary markets for PCs satisfies demand of computer services in the residential sector. To achieve these goals a probabilistic survey was carried out in Metropolitan Lima. 600 households were interviewed in this survey. Households were divided into socio-economic levels (SEL) A–E, with A being the wealthiest and most educated and E being the least. Results show that ownership of computers in the residential sector is closely related to SEL, for example, for the highest SEL, SEL A, 93% of households owned a computer, however, only 1% of the households owned a computer in the lowest SEL, SEL E. Regarding the penetration of used computers in households, results show that for SEL A, B, C and D the ratio of used versus new computer ownership increases while SEL decreases. In addition, 68% of the households without a PC at home (HPC−) reported that economic constraint of expense is the main reason to not own one. The survey indicates that people in Lima are increasingly using computers for education, business and entertainment. In general people show a preference to buy a new computer but cost considerations have led to the diffusion of used computers in lower income groups. The penetration rate of used computers in Lima's residential sector is low at this time. People's negative perception of the reliability of used equipment and willingness to pay for new computers affects this penetration rate. Also, residents reported that landfills is the least chosen option, for end-of-life computers, monitors and electronics, with self-reuse and storage being the most selected.