As years passed, IEC 60073 evolved—new annexes, updated diagrams, harmonized symbols for digital displays. The world it governed grew from hard-wired lamps into touch screens and haptic feedback. The standard’s spirit remained the same: make meaning obvious, reduce ambiguity, and keep people safe by ensuring devices speak plainly. Marco watched the evolution with pride and a quiet unease—standards must be lived, not merely printed.
Without this standard, a Chinese-made machine sold in Germany might use blue for "stop," leading to deadly misunderstandings. iec 60073 pdf