This document provides an overview of metrology and measurements. It discusses the general applications of metrology in various industries. It also outlines the key units of the course, which cover the basics of metrology, linear and angular measurements, advanced metrology techniques, form measurements, and measurement of power, flow and temperature. The first unit introduces concepts like the need for metrology, measurement methods, elements of measuring systems, and factors that influence accuracy and precision like environmental conditions and human errors. Common terms in metrology like standards, sensitivity, stability, and types of errors are also defined.