AbstractExpert systems (ESs) are currently considered the most commercially successful products of Artificial Intelligence (AI) research. They are now being used in different sectors of society to enhance the decision-making and problem-solving of experts in various domains.Firstly, this paper suggests that developing nations can use this new technology to capture and redistribute knowledge/expertise, and so bring about more availability of expert knowledge in their organisations and increase the quality of their decision-making and problem-solving. By consulting an Expert System, inexperienced personnel in the less developed countries can perform new tasks or their existing tasks more proficiently. Secondly, the role of implicit (tacit) knowledge in expertise/skill is examined, and how this elusive ingredient of knowledge can be developed or increased by the use of ESs is explained.