French classification: 221 (also known as Spanish classification)

French classification: 141 (also known as Spanish classification)

French classification: 241 (also known as Spanish classification)

French classification: 220 (also known as Spanish classification)

French classification: 242 (also known as Spanish classification)

This is mostly known as classification and (subject) indexing.

This is known as leave-one-out classification.

French classification: 151 (also known as Spanish classification)

It is also known as reverse card sorting or card-based classification.

This process is known as classification.