NJOY

NJOY is a name that can refer to two distinct entities in very different fields: a brand of electronic cigarettes and a nuclear data processing software package. The two uses are unrelated aside from sharing the same string of letters.

NJOY (electronic cigarettes) is a U.S.-based brand of vaping products that markets battery-powered devices designed to aerosolize nicotine-containing liquids. The company offers various device types, including disposable and rechargeable units, along with a range of flavors and nicotine strengths. NJOY has been part of the broader e-cigarette market, which vendors and regulators regard as an alternative to traditional cigarettes and as a product subject to age and advertising restrictions in many jurisdictions. The brand has faced regulatory and legal issues in some markets related to marketing practices and youth access.

NJOY (nuclear data processing) is a software package used by researchers and engineers to convert evaluated nuclear data libraries, often in ENDF format, into practical cross-section libraries for use in reactor physics, radiation transport, and shielding calculations. The package supports procedures such as resonance processing, Doppler broadening, thermal scattering data preparation, and generation of application-specific libraries for simulation codes. NJOY has been widely adopted by the nuclear data community and linked to many major data libraries and transport codes, serving as a standard tool for preparing nuclear data for simulations.