Waste picker in the context of "Waste management"

A shack (or, in some areas, shanty) is a type of small shelter or dwelling, often primitive or rudimentary in design and construction.

Unlike huts, shacks are constructed by hand using available materials; however, whereas huts are usually rural and made of natural materials (mud, rocks, sticks, etc.) shacks are generally composed of scavenged man-made materials like abandoned construction debris, repurposed consumer waste and other useful discarded objects that can be quickly acquired at little or no cost and fashioned into a small dwelling.

Scrap consists of recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap can have monetary value, especially recovered metals, and non-metallic materials are also recovered for recycling. Once collected, the materials are sorted into types – typically metal scrap will be crushed, shredded, and sorted using mechanical processes.

Metal recycling, especially of structural steel, ships, used manufactured goods, such as vehicles and white goods, is an industrial activity with complex networks of wrecking yards, sorting facilities, and recycling plants. The industry includes both formal organizations and a wide range of informal roles such as waste pickers who help sorting through scrap.

Vagrancy is the condition of wandering homelessness without regular employment or income. Vagrants usually live in poverty and support themselves by travelling while engaging in begging, scavenging, or petty theft. In Western countries, vagrancy was historically a crime punishable with forced labor, military service, imprisonment, or confinement to dedicated labor houses.

Both vagrant and vagabond ultimately derive from the Latin word vagari, meaning "to wander". The term vagabond and its archaic equivalent vagabone come from Latin vagabundus ("strolling about"). In Middle English, vagabond originally denoted a person without a home or employment.