The term 'SPECIFICATION' (abbr. SPEC and STD) is used in many different contexts, but generally refers to a detailed description of a product or service. SPEC stands for 'SPECIFICATION, ' while STD stands for 'STANDARD.' In the context of engineering, a SPECIFICATION is a document that outlines the requirements, materials, design, and performance of a product or service. A STANDARD is a set of criteria that must be met in order to ensure the quality and safety of a product or service. Both specifications and standards are important tools for ensuring that products and services meet the necessary requirements.