Graduated in 1981 with a master’s degree in architecture – but as a software developer. Beginning with computer-aided architectural design, and morphing over the decades into VR / AR / MR / XR. Beginning with FORTRAN on a mainframe with monochrome-green storage-tube CRT graphics terminals, and morphing over the decades to C and C++ on *NIX stations, X11 Windows, Microsoft Windows, Oculus Rifts and Microsoft HoloLenses.