Open Systems International | 59,182 followers on LinkedIn. The Open Systems International (OSI) page is no longer active. Please follow the AspenTech Digital Grid Management page for all our lastest updates related to the power and utilities industry. Aspen Technology is focused on optimizing transmission and distribution systems for utility companies in the power industry, which places the company in the middle of the global electrification imperative, including managing the complexity created from a broader set of renewables and other power sources.