Every good in the game. Raw goods come off the land; everything else is made from them in factories. A good's worth is what towns and the computer price it by.
Raw goods · 17
Worked from the land on a site, or bought from the computer.
Intermediates · 25
Made in factories from raw goods, and made into products.
Products · 32
Finished goods: sold to towns, on the players' market, or built into defences.