What the heck does "pls" mean?

I see that word a lot after many of the questions in this section, and I'm wondering what it means. I know it doesn't mean please, because surely anyone who is going to ask people to take valuable time out of their day to do their homework for them would not be so ill-mannered as to mock all standards of... show more I see that word a lot after many of the questions in this section, and I'm wondering what it means. I know it doesn't mean please, because surely anyone who is going to ask people to take valuable time out of their day to do their homework for them would not be so ill-mannered as to mock all standards of politeness and decency by deliberately misspelling the word "please," so I assume that it must be some kind of internet abbreviation with which I am not familiar. So what does it mean?
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