actions and devices that are used by the owners of software or information to prevent people from accessing or copying it from the internet without permission 數字版權管理(指軟件或信息擁有者爲防止互聯網盜版行爲所采用的措施或裝置) DRM-protected music files 受數字版權管理保護的音樂文件 The publisher has a DRM system that restricts use of downloaded software. 出版商有一個限制使用下載軟件的數字版權管理系統。