olemus
andmekogum IBM-i suurarvutites, on korraldatud loogilisteks kirjeteks ja plokkstruktuurideks
= in IBM mainframes: a collection of logically related data records
stored on one disk storage volume or a set of volumes

ülevaateid
https://en.wikipedia.org/wiki/Data_set_(IBM_mainframe)
https://share.confex.com/share/123/webprogram/Handout/Session16119/16119%20-%20Get%20to%20Know%20Your%20Data%20Sets.pdf
http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/users/kschmidt/mainframe/lutzkuehner/Chapter05_Working_with_data_sets_slides.pdf

vt ka
- andmestu (1)