Malignant narcissism is a theoretical, experimental diagnostic category.

The Model I was approved for limited flight, in the experimental category.

Awards for the film included the Genie Award in the arts and experimental category.

Due to the lack of orders for the design it was never certified and the sole example was flown in the "experimental" category, registered as N91892.

The Storm were mainly sold as kits and flew in the ultralight or experimental categories, depending on the jurisdiction.

This variant is available as a 2 seat LSA or a 2+2 in the experimental category.

The aircraft was registered in the experimental category and several attempts were made to register it in the restricted category for aerial photography.

Only one C100-S was ever built and it is registered in the experimental amateur-built category.

Research typically falls into one of four categories: experimental, descriptive, historical, or philosophical.

In America, it is regarded as a centreline twin operating under the experimental category.