What category in Dewey classification describes resources about making useful things?

The category in the Dewey Decimal Classification System that describes resources about making useful things is the 600s. This section is specifically dedicated to technology and applied sciences, encompassing areas such as engineering, agriculture, home economics, and medical sciences. It includes practical, hands-on knowledge that supports creating and using various tools and products to solve everyday problems.

The 100s are primarily concerned with philosophy and psychology, while the 200s cover religion and its various branches. The 800s focus on literature and language, including poetry and drama, rather than practical applications or the making of useful items. Therefore, the classification of resources about making useful things accurately falls within the 600s, reinforcing its focus on practical disciplines and inventions.