Furlongs

The US only sometimes uses the survey units, most commonly in the context of surveying. As a result, you will sometimes see survey units used to define the borders of real estate parcels and such, but they are not the standard units that most Americans actually use on a day-to-day basis. For example, if you buy a foot-long ruler, it should be an international foot (i.e. 304.8 mm), not a survey foot. NIST and other federal agencies plan to phase out the survey units beginning in 2023, but they do plan to retain some legacy data in that format for backwards compatibility reasons.

Source: https://www.nist.gov/pml/us-surveyfoot