There are various theories as to the origin of the expression but old-fashioned print compositors claim it for their own. A lower-case p the wrong way round is a q.
Print compositors had to pay attention to detail, and so do we in running our small businesses. I was looking at my routine expenses the other day while doing my quarterly VAT (sales tax) return. I noticed that there were a few small monthly charges for services I never use, almost never use, or which are completely unnecessary if I am paying two providers for the same thing.
Like many people, I like a good idea and am willing to sign up for something useful, perhaps on the spur of the moment. However, I might sometimes forget that I am actually duplicating or purchasing two services which are fairly alike. Do I need two on-line directories? How much blogging coaching do I need to pay for when half of it I do not have time to do, or it is essentially what I am already paying for elsewhere.
I am stopping a lot of payments of mainly very small amounts but they all add up to quite a saving.
Are you paying for stuff you do not need or do not use? Have a look. You may get a surprise, plus more money to play with.