Discrimination is prejudiced treatment or consideration of, or making a distinction towards, a being based on the group, class, or category to which they are perceived to belong. These include age, caste, criminal record, height, disability, family status, gender identity, gender expression, generation, genetic characteristics, marital status, nationality, color, race and ethnicity, religion, sex and sex characteristics, sexual orientation, social class, species, as well as other categories.
In Polish universities there are more and more problems related to discrimination. The techniques are sophisticated and the practice is called discrimination in white gloves. Discrimination is prohibited and is becoming more common.