A nix; a hobgoblin.
"The system administrator checked the NIS logs to troubleshoot why user authentication was failing across all servers in the legacy network."
Initialism of Network Information Service.
Contraction of ne is
"The doctor's prescription notes that nis stands for nitroglycerin, a common heart medication."
Initialism of Naftna Industrija Srbije, a Serbian multinational oil and gas company
"The government announced new investment plans for NIS to expand its refining capacity across Southeast Europe."