Items are the basic resources in the game, and are what is transported using conveyor belts. There are many items, comprising of Resources and Products(?). All items can be sent to the Origin, some having blocks that require them as ammunition or as an ingredient for a Product(?).
There are also items which can be crafted.
Resources are what you must collect in the game. They are naturally found in the terrain of the map, and can be collected with Drills.
the craftable items can be crafted with their respective operated machine