A cancerous tumor of the central nervous system originating in the cerebellum, especially in children. Also called medulloblastomas.

Primitive NeuroEctodermal Tumor.

PnET is a model which simulates carbon, water and nitrogen dynamics of forest ecosystems. This model is built for 2-d large domain simulation for air quality studies. The model is based on PnET-II from SGCP at NCSU and PnET-CN in daily stepping from UMN.

The Danish fieldbus. The Profibus organisation is seeking to integrate this in the common Profibus PA protocol.

Peaceful Nuclear Explosions Treaty