And the login screen is just taken from the manual for the MVS TK-4 system: https://mobile.twitter.com/mainframed767/status/1258028638617796608 https://mobile.t

And the login screen is just taken from the manual for the MVS TK-4 system: https://mobile.twitter.com/mainframed767/status/1258028638617796608 https://mobile.twitter.com/mainframed767/status/125802863861... So the pictures are: a stock photo of a mainframe, a stock photo of a Raspberry Pi, and a cropped screenshot from an MVS installation manual. Looking at OP's other tweets he appears to be a pretty shamelessly self-promoting "thought leader" type so I would be pretty unsurprised if it's bullshit.