 This forerunner of VTLS Classic and Virtua, consisting of an Online Public Access Catalog (OPAC) and an automated circulation system, was installed at Virginia Tech's Newman Library in September 1975.By 1980, the software had evolved into the integrated library system (ILS) known as "VTLS Classic", a MARC based ILS including library automation.In 1983, VTLS became the first integrated library system to implement linked Authority Control and to feature full integration and support of the MARC Format for bibliographic records.