This is a male bartender standing behind the bar with his hand on the tap.
A person is upright behind the bar.
Further, NIST has issued numerous Federal Information Processing Standards, as well as a comprehensive description of basic concepts and techniques entitled An Introduction to Computer  The NIST Handbook, Special Publication 800-12, December 1995, and Generally Accepted Principles and Practices for Securing Information Technology Systems,3 published in September 1996.