Mainframe, MVS and zOS Discussion

Hi,

What is DF in DF Sort I always wonder...is there full form of it?

once upon a time IBM started prefixing the data management product name with
the acronym of Data Facility

DFEF Data Facility Extended Functions
DFP Data Facility Product

DFSORT
DFSMS
DFHSM
DFDSF
DFDSS

later on some of the names were changed to include also sms into it
DFsmsDSS
DFsmsDSF

I would suspect Data Facility, but I am not sure if that was retrofitted to the name or if DF always meant that for the Sort product.

Thank you enrico and Robert. I made some search on the IBM site but I could not find a section where they define these terms.... looks like no one is usually want to know all this...