This paper attempts to identify models of knowledge acquisition and dissemination that are appropriate for the 21st century organizations facing complex and rapidly changing business environments. The specific aims of this paper are to (1) propose a new socio-technical model for Knowledge Management, (2) discuss some mature as well as emerging technologies that are now widely used for Knowledge Management, and (3) present few emerging learning systems and environments, and introduce how shadowy groups called “Communities of Practice” and “Share Groups” are transforming the acquisition, creation, packaging, and application of knowledge.