Shore durometer "durometer" (ISV "duro-" and "-meter"; attested since the 19th century), but today that name usually refers to Shore hardness; other devices use other measures, which return corresponding results, such as for Rockwell hardness. There are several scales of durometer, used for materials with different properties. The two most common scales, using slightly different measurement systems, are the ASTM D2240 type A and type D scales. The A scale is for softer ones, while the D scale is for harder ones. However, the ASTM D2240-00 testing standard calls for a total of 12 scales, depending on the intended use: types A,
East Shore, Staten Island and from the Lower New York Bay on the east to the western boundaries of ZIP Codes 10304, 10305 and 10306, on the west. Not only the term "East Shore," but the very concept is often attributed to New York Telephone's East Shore Central Office (now officially known as the East Staten Island Central Office), which has served this part of the island since the 1920s (the northern boundary of this office's territory is situated, on average, about ¾ mile south of the Staten Island Expressway, built in the early 1960s). Such Staten Island neighborhoods as Arrochar, South Beach, Grasmere,