: Historically, UBL-1-0-SBS-cd2.zip and similar filenames refer to "Committee Draft 2" packages for the Universal Business Language (UBL) standard, used for reviewing schema and XPath information. XPath information for UBL 1.0 cd2 - OASIS
: Used extensively in primary English education, Let's Go 2_CD2.zip provides the second set of audio tracks for student books and workbooks in the Let's Go curriculum.
: In introductory Turkish courses (such as those at McGill University ), et-cd2.zip contains the essential audio files for Volume 2 of the Elementary Turkish textbook. English Language Learning (ESL) :
: This series often packages its audio materials as zip files, where CD2.zip contains the listening exercises for Level 4 or other specific modules.