The latest version of Aircraft Technical Publishers' electronic Maintenance Director system (version 3.1) is now available.Launched in 1996, the Maintenance Director claims to be the most up to date and user friendly aviation maintenance software on the market. ATP is the aviation industry's single source provider of maintenance and regulatory information on all aircraft, helicopters, avionics, components and powerplants. It maintains more than 16,000 microfiche, CD-ROM, DVD and Internet-based library subscriptions for a worldwide customer base.