Steve Jobs and the History of Cocoa, Part Two
Subject:   Generations...
Date:   2002-05-13 09:14:29
From:   glenmark
You wrote: "The original Macintosh operating system could run just a single program at a time on a computer with 64K of ROM and 64K of RAM. (The 128K Mac was Apple’s second-generation Macintosh computer.)"

While Apple probably had internal prototypes with just 64K of RAM, the first version to market had 128K of RAM. The 512K Macintosh was the second-generation system.