Historians compared feudal systems across different regions to understand variations in land tenure.

Researchers compared the activity patterns of parasympathetic nervous systems in different mammalian species during rest.

The engineers tested the track and bowl systems for durability before installation.

Scientists compared the peripheral nervous systems of different species to understand how sensory processing evolved.

The new motorcycles are equipped with combined braking systems that automatically balance front and rear braking to reduce stopping distance.

Marine biologists studied how starfish coordinate movement using their water vascular systems during prey handling.

Dewey Decimal Systems often vary slightly between libraries that specialize in different subjects.

Researchers use iterated function systems to generate complex fractal patterns from simple affine transformations.

Many airlines rely on global distribution systems to manage inventory and ticketing across multiple markets.

Research engineers compared the accuracy of hyperbolic navigation systems under various atmospheric conditions.