Definition of Quantity Surveying; historical development of the quantity surveying profession. Functions performed by a quantity surveyor. Career opportunities for the Quantity Surveyor. Professionals in the construction industry and their interrelationships. Professional bodies in the construction industry and their significance; the relationships between the Nigerian Institute of Quantity Surveyors (NIQS) and the Quantity Surveyors Registration Board of Nigeria (QSRBN). Applied Mensuration: Measurement and computation of girth, area and volume for both regular and irregular shapes from dimensioned drawings; Principles of measuring gross and adjustments. Setting up dimensions on taking off sheets and squaring to compute girths, areas and volumes