: In a July 1873 edition of The Telegraph and Messenger (Macon, Ga.), 18602x is listed as a specific identifier for "Bleached" case goods or "Dress Goods" received by a local merchant. 18602x
: There are similar product identifiers in electrical and automotive sectors, such as the IDEAL PowerPlug 30-102X for ballast wiring or the Blue Streak S2102X distributor condenser. : In a July 1873 edition of The
to measure biopterin levels in piglets after iron dextran applications. is used within linear regression equations
In various scientific publications, is used within linear regression equations, typically representing a slope or coefficient: