There will be a mainframe 50 event next Tuesday - April 8, at 2 p.m. ET. I recommend to watch this live stream. You will find more information here . By the way on April 7 is the 50th anniversary of the first mainframe announcement. The IBM System/360 was announced on April 7, 1964. The announcement press release is here and some more technical details are here . ... and there is one more anniversary this year: the 49th anniversary of VSE.