NPE

noun3

1. •
   Initialism of null pointer exception.
2. •
   Initialism of non-practicing entity.

   • Therefore, arguably, the existence of NPEs helps facilitate and regulate supply and demand. — 2019
3. •
   Initialism of nonylphenol ethoxylate.

   • The most important and commonly used APEs are nonylphenol ethoxylates (NPEs), which account for 80% of the APE market. — 2008