Thread regarding Sears layoffs

Don't get mad at me and yes I work for Sears, but what the hell are all these abbreviations? What the hell does OP mean?

YOU are OP in this particular case , writer of this thread.

So, OP, you might wanna lighten up a bit...

OP = Original Poster. which on this thread would be you.

It’s not a sears thing it’s an internet thing. It means original poster