Jeff Walther wrote: It was perfectly sensible. Using a 16-bit wide bus reduced the manufacturing cost, allowing the machine to be priced less than the Mac II family machines, including the Mac IIsi. Same reason the original IBM PC had an 8088 rather than an 8086. If you wanted a machine with a 32-bit bus, Apple offered plenty of models that had it. They were more expensive. Eventually costs came down enough that in the LC III a 32-bit bus was used. I worked for Apple at the time, and knew and had discussions with some of the people involved. They were doing everything they could to keep the cost of the LC down. There was even talk of using some interesting tricks to compress the ROM contents in order to use the next smaller size of ROM chips, but I don't know whether that was actually done. Eric