 Over the years more people joined who were interested in the history of timekeeping devices, and eventually two separate divisions were set up, a ' (Scientific Division) and a "" (Historical Division).When the clock and watch industry withered in the fourth quarter of the 20th century the technical division withered, and by 2000 the divisional structure was dropped.Today the bulk of the membership unites collectors, scholars and museum professionals interested in the historical aspects of clocks, sundials and watches.