Description Aren't you glad you're a member? Gladstone is. Gladstone is focused on member-based health and sports clubs, providing them with such electronic member relationship management services as computer systems and smart card programs. The company's flagship membership management product, Gladstone Plus2, enables online booking and payment. Gladstone's Centremaster, a computerized business management system, is designed for small and medium-sized leisure organizations. Formed in 1999, Gladstone also offers services in project management, technical installation, and data testing. Constellation Software, an investor in "niche" software companies, owns about 44% of the company.