The term PH. BK. LISTINGS is an acronym for 'Property and Business Listings'. This refers to a job that involves listing properties and businesses for sale or rent. The job requires the ability to accurately list the details of the property or business, such as location, size, features, and price. NOS stands for 'National Occupational Standards', which are standards set by the government to ensure that workers in certain occupations have the necessary skills and knowledge to do their job properly.