The Computer Systems Analyst category only requires a post-secondary diploma and 3 years of experience, or a full bachelor's degree.

When I interviewed with Google and Facebook a few years ago, neither of them were concerned that I don't have a bachelor's degree (I have a 2 year post-secondary diploma). I can't remember which one it was, but one of them thought they'd be able to get me an O-1 visa as a backup plan if a TN was unexpectedly rejected.

That's right, there are a few TN occupations that don't require a bachelor's degree including Computer Systems Analyst, Management Consultant, and Scientific Technician/Technologist.