Linked from
The 7 pages that link to Solder, each with the reason it gives.
SolderingBroader topic: Its composition and melting range determine how the joint forms.
TinRelated: Tin is a major ingredient in many solders, especially lead-free formulations.
Eutectic systemBroader topic: Many solders use eutectic compositions for sharp, predictable melting.
CassiteriteRelated: Tin from cassiterite is a major ingredient in many solders.
Tin miningRelated: Tin is a major component of many solders.