QS Industries, often referred to as QSI, is the company that designed the custom ASIC that is the heart of their unique DCC multifunction decoders.
Filling in the details currently, but this is the company that supplied OEM decoders, and lately is direct selling their HO and O scale Titan decoders.
Q.S. Industries, Inc.
17924 SW Oak St.
Beaverton, OR 97007