"system of muscles considered with reference to its origin and development," 1875, from French musculature, from Latin musculus (see muscle (n.)).
character encoding system originally invented for use with the telegraph, by 1860, earlier Morse key (1858), so called in honor of Samuel F.B. Morse (1791-1872), U.S. inventor who produced a system of telegraphic communication in 1836. He invented both the recording telegraph and the alphabet of dots and dashes.
"process of laying roads according to the system of John L. McAdam;" 1824, noun of action from macadamize (see macadam).