The term "harness" has been used for many centuries for part of the collection of equipment known as horse tack, essential in the domestic, military, and agrarian use of horses. Several derived contexts now exist. Examples:

• Child harness
• Climbing harness
• Dildo harness (a "marital aid")
• Dog harness
• Hang gliding and parachuting use harnesses
• Harness racing and see related articles such as Australian Inter Dominion Harness Racing Championship
• Lunatic Harness (a recent 13-track musical album)
• "Tidal harness" is a device for generating tidal power
• Worshipful Company of Coachmakers and Coach Harness Makers