Trace Center Origin and Evolution.- Augmentative Communication (1971-).- Pre-Internet/Pre-Web Summative Information (1970s-1990s).- Computer Access (1980-).- Electronic Consumer Products and General Accessibility (1990-).- Web Access (1990-).- Telecommunication Access (1990-).- Kiosks and Information-Transaction Machine Access (1999-).- Accessibility Infrastructure (2010 -).- Move to University of Maryland (2016).- Elements that Have Defined the Trace Center.- Some Lessons Learned from Trace's First 50 Years.- Trace's Focus for the Next Decade(s) (2021-).