The Job Family Tree

From oil lantern to smart-grid sensor — 200 years of the person whose job was to keep the city's lights on.

A 3-card occupational family tree for the HVAC technician, tracing six predecessor roles from the medieval Cold-Cellar Keeper (c.1400) through the Ice Man (1840–1910) and Refrigeration Engineer to the present day — with a signature ancestor illustration of the ice man and a full cold-tool artifact timeline from hand saw to split-system heat pump.

From wooden clapper to recommendation engine — 5,000 years of the person whose job was to decide what everyone else paid attention to.

From reed stylus to LLM text box — 5,000 years of the person in the room whose job was to make sure every word got written down.

From messenger to machine — 5 centuries of routing information for other people.

From scribe to UX designer — 5,000 years of shaping how humans read.

A 3-card occupational family tree for the modern barista — from medieval ale-wife to soda-fountain jerk to espresso bar, with era-color-coded evolutionary tree, signature ancestor illustration, and tool evolution sequence.