The 8-story Pearlridge Office Center was completed in 1976.
Photo from http://www.pearlridgeonline.com (website on Internet Archive Wayback Machine)

1977 and the basic footprint of the complex is in place. A 21 million dollar PHASE II opened in late 1975, with fifty stores. It and the PHASE I mall are now connected via a monorail system, known as SkyCab. A PHASE III structure has also been built. With these additions, the PEARLRIDGE malls encompass approximately 1,050,000 leasable square feet. Free parking is provided for 5,000 autos.

The .2 mile Skycab commenced operation in November 1977. Today, it is the only remaining shopping center transit system in the USA (there were others in Fort Worth, Texas and Dearborn, Michigan). Apparently, the Skycab system is currently not in operation.
Photo from Wikipedia / "Musashi"