I think a lot of people here (and the author of the article) are missing the obvious: an engineer is someone who works with engines. An engine is basically just a machine that does work. The question is really whether software can be considered "machines." They're certainly complex devices made up of different parts working in unison that perform work, so I think yes. If a bridge can be considered a machine then surely so can software. Therefore, programmers are engineers. All this talk about rigid specifications, certifications, math, respect for the title, etc. is very odd to me.