boss, n:
According to the Oxford English Dictionary, in the Middle Ages the words "boss" and "botch" were largely synonymous, except that boss, in addition to meaning "a supervisor of workers" also meant "an ornamental stud."

"tool"

Definition: instrument used to shape, form, finish

Synonyms: apparatus, appliance, contraption, contrivance, device, engine, gadget, gizmo, implement, instrument, job, machine, means, mechanism, utensil, weapon, whatchamacallit

Credit: thesaurus.com

Tools represent Humanity's greatest achievement -- the desire and the ability to rise above the flesh, to enable each of us to create whatever we imagine. From the ealiest stick, digging out grubs from a fallen tree ... to the latest hand-held, head-held, or mentally-directed device, tools allow us to devise, revise, ruminate, communicate, work and play.

The following sampling are tools developed upon need for one purpose or another...