I heard it's baby boomers, gen X, mellinials (probably butchered the spelling on that) then generation Z for those darn kids on their i-phones and their computy-gadgets.
There's also a term 'Xennials', to bridge the gap between GenX and Mellinials, who were born in the late 70's, who were born into analog technology and had to learn digital stuff.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://m.youtube.com/watch%3Fv%3DD9qcV89oFIw&ved=0ahUKEwi1xabVgpTaAhVDnq0KHYfLBtwQ3ywIJzAA&usg=AOvVaw0G5BzENs75Z0aOSG8PRCpE