A coordinate measuring machine (CMM) is a device that measures the geometry of physical objects by sensing discrete points on the surface of the object with a probe. Various types of probes are used in CMMs, including mechanical, optical, laser, and white light. Depending on the machine, the probe position may be manually controlled by an operator or it may be computer controlled. CMMs typically specify a probe's position in terms of its displacement from a reference position in a three-dimensional Cartesian coordinate system (i.e., with XYZ axes). In addition to moving the probe along the X, Y, and Z axes, many machines also allow the probe angle to be controlled to allow measurement of surfaces that would otherwise be unreachable.
Boston is a port and market town in Lincolnshire, on the east coast of England, about 100 miles (160 km) north of London. It is the largest town of the wider Borough of Boston local government district. The town itself had a population of 35,124 at the 2001 census, while the borough had a total population of 66,900, at the ONS mid-2015 estimates. It is north of Greenwich on the Prime Meridian.
Boston's most notable landmark is St Botolph's Church ("The Stump"), the largest parish church in England, visible for miles around from the flat lands of Lincolnshire. Residents of Boston are known as Bostonians. Emigrants from Boston named several other settlements around the world after the town, most notably Boston, Massachusetts, in the United States.