H1B petitions in computer occupations are predominantly in software development and computer programming.

About 30% are for "computer systems analyst" or "computer occupations, other" but I don't really buy most of those petitions aren't actually for devs. All software developers on TN visas (NAFTA/USMCA visas) are officially "computer systems analysts" for example.

Not sure where are you getting 32% from. The table on p. 15 has "Systems Analysis And Programming" at 56% of all petitions. Other computer related occupations are 10.4%

https://www.uscis.gov/sites/default/files/reports-studies/Ch...

"Systems Analysis And Programming" (62.2%) and "Computer Occupations, Other" (8.4%) are together 70.6% in 2017. That's the approximately the same population as "254k/365k of H1B petitions in 2017 were for computer occupations" which is about ~70%.

So 86% of of "Systems Analysis And Programming" and "Computer Occupations, Other" are "Systems Analysis And Programming".

If you want to assume "Computer Occupations, Other" are not devs, which is not a good assumption in my opinion then fine only 86% are devs.

Why are we switching to 2017 suddenly? Still, where are the 32% came from in your previous comment?

I believe that some (almost all?) are Software Engineers on TN visa are Engineers.

In an informational bulletin, USCIS also stated that “Engineers may not fill computer-related jobs under TN classification unless they have credentials as computer or software engineers from institutions that recognize computer or software engineering as bona fide engineering specialties offering full engineering credentials, such as professional engineering licenses.” USCIS Employment Bulletin: NAFTA (2005).