Fun fact: in the old days of Macs, when the faster 68020 processor came on the market, it was put in the new Mac II. When the the 68030 processor was later introduced, Apple dictated that an “X” be added to the end of the model number. So the Mac II became the 68030 Mac IIx. Well, that naming scheme worked fine until Apple decided to upgrade the SE to a 68030. I guess Apple didn’t want to try and explain the Macintosh SEx.