This paper explores tacit knowledge sharing. This case demonstrates the significance of knowledge sharing to organizational performance, by exploring the contribution of tacit knowledge sharing to the success of projects in the Australian Film Industry (AFI). The differences between knowledge sharing, collaboration and communication, and their interrelations are addressed. We also explore the concepts of knowledge, information, and data. In the interchanges reported here the knowledge shared is almost entirely tacit, and the “raw” data and information do not exist without the context that makes them knowledge. The paper includes the identification of many factors affecting knowledge sharing, not all of which have been identified by previous researchers. This research contributes to a better understanding of tacit knowledge and how that knowledge is shared. This in turn contributes to a better understanding of how knowledge management can be supported in a modern organization, where often the technology is used in ways not well understood by system managers and software developers. A better understanding can lead to better ICT design and support of knowledge sharing both within and across organizations.