that gives advice or instruction on a particular topic
A brief informal description of how to accomplish a specific task.
A book or other guide describing how to accomplish tasks in a certain field
Actively engaged in fighting or dealing with the enemy; in battle or on maneuvers.
Away from the office, classroom, or laboratory; working with people or things in their natural environment.
Used other than figuratively or idiomatically: see in, field.
In a real-world setting, as opposed to the controlled conditions of a laboratory or the hypothesized parameters of a theoretical approach.