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A trademark for: a multi-user operating system designed for use with mainframe computers.
1960s. Acronym from the initial letters of multiplexed information and computing service.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。