1. (Tools) a piece of equipment for measuring the hardness of a material, in particular plastic or rubber. 2. (Units) the measurement of the hardness of a material, in particular plastic or rubber.
The DSM-5 was published on May 18, 2013, superseding the DSM-IV-TR, which was published in 2000.
Following the development of the home-use PCM-1 digital audio processor in 1977, the professional-use PCM-1600, which used the U-Matic machine, was launched in March 1978. As a master recording system for CD software, the PCM-1600 brought digitization to the recording studio.