Supermarket Atmospheric Pressure Water Tube Boiler For Sale
Baker Perkins in the Chocolate and Confectionery Business
The Development of Machines and Processes from 1949 onwards. It is not easy to put the developments that have taken place over 40 years or so in a strict chronological order, so for clarity they are divided into two sections with some indication of dates whenever possible.
Tech Level - Atomic Rockets
The role-playing game Traveller popularized the use of tech levels in 1977. The tabletop boardgame Civilization popularized the use of tech trees in 1980. And pretty much every 4x game uses tech trees, with the items accessed by investing in tech research.