In this context, the beginning would be designing, building and debugging (getting to work) a "serious" digital circuit or piece of software. Woz's analog work, e.g. the critical switching power supply for the Apple, is a bit beyond that.

I'm not sure how to define the threshold for a digital circuit in those days (that's not my field, for one thing, and the Lisp Machine ones I was vaguely familiar with are huge in comparison to a personal computer of that era).

For software, I'm not sure how to define it in words, but "I know it when I see it" ^_^. Certainly more than "a few thousand lines of C code" ... maybe, it depends on the code. More than you're generally required to do to get an EE (sic) degree....

However, for Jobs, as far as I know he hasn't come close to the thresholds in either domain. Famously, he hired Woz to do that block of Atari digital design work, and as for software, I'm not aware of any programs he's written, and there's these tidbits for backup:

Woz: "Steve jobs never programmed in his life." (http://davidweiss.blogspot.com/2006/10/woz-at-microsoft.html)

This one may be folklore but it's just too fun not to include:

"It's a pleasure to meet you, Professor Knuth," Steve said. "I've read all of your books."

"You're full of shit," Knuth responded.

http://www.folklore.org/StoryView.py?project=Macintosh&s...