OHWM meaning in Community ?

The Oxford History of Western Music is a narrative history from the "earliest notations" (taken to be around the eighth century) to the late twentieth century. It was written by the American musicologist Richard Taruskin. Published by Oxford University Press in 2005, it is a five volume work on the various significant periods of Western music and their characteristic qualities, events and composition styles. A paperback edition in five volumes followed in 2009. Oxford University Press had previously published narrative histories of music, although Taruskin's was the first sole author work, spanning over 4000 pages.