What is it called when people, e.g. computer programmers, pronounce, say, 65,536 as 'sixty-five, five, thirty-six' i.e. omitting 'thousands' etc?

I heard on ELU that computer programmers often pronounce long numbers like that. What is that method of saying the numbers called? How common is it? What is the point of it? What are the pros and cons of it?

65,536 was pronounced ‘sixty-five, five, thirty-six’.

Source:
"In computing contexts, we frequently read out large numbers with the "units" omitted. For example, 65,536 is read as "sixty-five, five, thirty-six", which is an abbreviation of "sixty-five thousand" five hundred thirty-six". – Canadian Yankee Apr 1 at 18:19"

Here: How do I say whether or not a number was pronounced like a telephone number (or zip code). Are there words for this?

Here’s corroboration:
"I find it really hard to imagine anyone saying "two-five-six-K" to me in speech, and if anyone did, I’m sure I would give them a mildly alarmed look. "Two-fifty-six-K" is very different, because that’s a common alternative to "two hundred and fifty-six" (and I should have noted that in my first comment!) – Yee-Lum Dec 14 ’15 at 17:22"

Here:Saying a number digit by digit