Bishwakarma or Viswakarma (Nepali: विश्वकर्मा) is an Indo-Aryan Nepali speaking group that primarily worked as metalsmiths. Later Nepal abolished its grading system. The tribal designation of Khas is given in only a few contexts to Bishwakarma. They have also been discriminated by various social classes for hundreds of years. Historically, they even lacked the right to read the Hindu religious books, and were only allowed to go to school about 50 years ago. Although the problem of untouchability in Nepal has significantly decreased problems still exist in almost all parts of the country.