Tom Marchant’s article Fighting the Media’s Mainframe Misconception: Proving the z13 is Modern says that mainframes "are simpler to administer, use less power, require less floor space and cooling, and have a lower total cost of ownership" compared to other systems. Top Gun has refurbished z13 mainframes, allowing for even lower TCO. If you need to add features to your existing z13, we have many including: 0890 Crypto5S 0418 FICON [...]