Linked from
The 17 pages that link to Resistor, each with the reason it gives.
Electrical impedanceRelated: An ideal resistor contributes resistance but no reactance to impedance.
Electric circuitRelated: Resistors limit current and create voltage drops in circuits.
OhmRelated: Its rated resistance is commonly stated in ohms.
Electronic circuitRelated: It sets current and voltage levels throughout many electronic circuits.