This paper investigates knowledge management (KM) practices by small and medium-sized enterprises (SMEs) in Thailand with view to understand how special characteristics of SMEs influence KM processes in such businesses. Most of the prior discussion has focused on KM and its prevalence in large organizations where the practice of KM permeates every KM sub-process. However, small and mediumsized enterprises (SMEs) may not perform these processes to the same degree due to their specific characteristics and limitations. A qualitative research method is used via two case studies to analyze the common current practices in KM in Enterprise Resource Planning (ERP) service providers. Two companies in Thailand were selected for this in-depth study. Detailed observations highlight the similarities between the SMEs' KM practices and their divergence from those generally observed in large organizations. Analysis demonstrates that certain SME characteristics seem to affect the KM subprocesses in interesting ways. Findings are serving as a pilot for conducting a qualitative study of a much large number of SMEs and also to construct a research model for a quantitative study of SMEs' KM practices.