Salvage Computing is the art of utilizing only already available computational resources, to be limited by that which is already produced. It's about figuring out how to make the best possible use out of the millions of devices which already exist.
Scavenge-friendly electronics are parts that are no longer manufactured, but that are available by the billions in landfills. Those who can manage to create new designs from scavenged parts with low-tech tools will be able to preserve electronics.