more abstract objets by field
Biology DNA, Cells, Evolutionary Trees
Physics Particles, Waves, Fields
Chemistry Atoms, Molecules, Reactions
Psychology Cognition, Emotions, Motivation
Sociology Social Structures, Institutions, Cultural Norms
Anthropology Cultural Artifacts, Linguistic Structures, Rituals
Literature Imagery, Symbolism, Narrative Structures
Art History Artistic Movements, Styles, Techniques
Musicology Melodies, Harmonies, Rhythms