What does the acronym HELC stand for?
.....
Home
Equity
Line of
Credit
Also known as HELOC.
See:
<http://en.wikipedia.org/wiki/HELOC>
In related news...
I understand your implied point: not too long ago it was considered polite (hell, necessary) to explain terms your readers might be unfamiliar with. It's still common practice for authors of essays, news articles and books.
But in the world of informal, online writing -- where powerful search engines and hyper textual links give the reader the ability to quickly go, in minutes, from uniformed to reasonably debriefed, a new etiquette has developed. It's summarized in the flat statement, 'Google exists'.
.d.