Rights are normally classified into two types: natural (also moral or inalienable rights), which are not man-made or artificial, and are universal and apply to all people, existing by necessity, inherent and inalienable, such as the right to life; legal (also civil or statutory rights), which are based on particular societal customs and actions by legislatures, such as the right to vote or even citizenship (which is also often said to be the right to have rights).
Rights are also categorized as claim rights (which entail that other persons than the one who holds such a right do not possess this right – i.e. someone must commit to or abstain from doing for the one to realise the benefit of the right) and liberty rights (or privileges, which is simply a freedom for the one to do as s/he desire). Rights that permit one to do something are termed positive, while rights permitting abstention are termed negative. Rights may belong to individuals as well as groups. Rights are also classified in terms of the domain they are attached to, and may thus be civil&political, economic, social and cultural rights.
Rights are relevant in the workplace – rights against workplace discrimination and harassment, right to time off work, rights against wrongful termination, rights for safety etc. are part of most modern employment contracts.