Where does “ry” come from?

ry (English): A test pattern consisting of a repeating character string alternating letters R and Y, used to test five-level teleprinter and radioteletype (RTTY) systems

Definitions

  1. A test pattern consisting of a repeating character string alternating letters R and Y, used to test five-level teleprinter and radioteletype (RTTY) systems

Words derived from “ry”

ry — Etymology, Origin & Word History | Etymology Explorer