People can't believe they're only just discovering what the letters HP stand for on HP sauce.
The delicious, tangy brown condiment is a staple for hearty meals and most people wouldn't think twice about what's behind the name.
When you put those two letters next to each other, it could mean anything really.
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But there's a clue about what the HP stands for on the bottle of the sauce.
A standard bottle will have the two letters emblazoned on the top in big, white writing, while Big Ben and the Palace of Westminster sits below in blue.
When you think about what the Palace of Westminster is, that will reveal what HP stands for: Houses of Parliament.
Don't worry if this is brand new news to you, loads of people have taken to social media to reveal they've only just caught on as well.
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One person said: "What? Does it really mean that?"
Another added: "I didn’t know that, it seems obvious now, but also incredibly weird as a brand name."
A third said: "Not until just now I didn't. I'm 47."
The revelation was trending following a post on Reddit, where a helpful person broke down the meaning behind the famous label.
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But that's not the only huge brand name that people are learning more about recently.
Loads of people were blown away when they discovered the hidden meaning behind the Amazon logo.
When the online shopping giant first started out all the way back in 1994, founder Jeff Bezos planned on creating the world's biggest bookstore.
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As such, he wanted a fitting name and logo.
Tech editor Brad Stone wrote in his best-selling book The Everything Store that the CEO initially landed on the name Cadabra, as in abracadabra, but this was decided against as it was confused with the word Cadaver.
After looking at a number of different possibilities, Bezos then turned to the A section of the dictionary and came across Amazon.
Stone explained in the book: "This is not only the largest river in the world, it’s many times larger than the next biggest river."
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It was a perfect fit for his intentions with the company, as he was hoping to make the online book selling platform equivalent.
Since those early days, Amazon has become a global juggernaut, branching out into pretty much any category you can think of.
And it's for this reason that the simple logo design it actually pretty damn genius.
You see, while most people assume the orange arrow under the name represents a smile, it's actually pointing from 'a' to 'z', highlighting that Amazon sells everything you could need.
Featured Image Credit: Mark Richardson / Alamy Stock Photo. d.w.burrows / Stockimo / Alamy Stock Photo