This paper surveys the landscape of knowledge management systems (KMS). It identifies four main conceptual frameworks for KMS: encouraging serendipity for problem recognition, knowledge creation for problem solving, knowledge acquisition for codification and storage, and mentoring/training for dissemination and sharing. The research finds gaps in knowledge creation and sharing require more work. Knowledge acquisition/storage is relatively strong, allowing practitioners to access knowledge to solve storage problems. The research also maps the limited range of studies on KMS.