Square is called a Robertson and is the standard for construction in Canada. None of that bullshit Phillips trash.
Not only the standard screw but a very effective head shape. The head is both self centring and can hold on the screw securely and without the use of magnets.
I will die defending Robertson screw as a top contender. The rest of the world must learn our superior Canadian ways, by force if necessary.
It's 100% superior to anything else I've used. If you use a good quality screw driver or bit, they'll NEVER strip, even using an impact driver.
Lately I’ve seen a lot more Phillips Square, which is nice when you strip the fuck out of the Phillips head. Those are alright.
Square is also the 'key' on old British trains for things that the conductor can operate that aren't supposed to be accessible to the public