I think it's the lest one: Rights given to original authors and creators to protect their work from unlawful use
If you want them only to read it and not change it send as a .pdf else I would send as a .txt file. Hope that helps
Answer:
Mainframes (also called "big iron")[1] are powerful computers used for large information processingjobs. They are mainly used by governmentinstitutions and large companies for tasks such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing. Mainframe computers are specially used as servers on the World Wide Web (WWW). They are distinct from supercomputers.