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Do you mean "Phillips", or "Posidrive"?
They need different bits as the angles are different. Use the wrong one, and you will chew up the head every time... [^]
Intersetignly, Posidrive was partial developed and is partly owned by ... Phillips.
There is also Torx, Allen, Robertson, ClutchDrive, and a wide range of oddball "security screws" - including a number that are "tighten only"!
Slotted are cheaper to make, and are useful for "historic jobs" where they should match existing screws - except in my Mercedes where the battery is under the drivers feet and accessed via a slotted screw that opens with a coin...
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
I've only seen those on restroom stall doors. Ever since they started using those screws, my ability to add to my collection of restroom stall doors has pretty much stalled out.
".45 ACP - because shooting twice is just silly" - JSOP, 2010 ----- You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010 ----- When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013
not forgetting hex, (and if you're smart you'll use wira bits for those).
As Griff said, Allen, the correct name for them.
"I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So I had to leave the place as soon as possible." - Mr.Prakash One Fine Saturday. 24/04/2004
Pozidriv is not just another name, it is a very different head compared to Phillips.
You cannot use a Pozidriv bit on a Phillips head and a Phillips bit on a Pozidriv screw very easily starts stripping.
Sometimes wikipedia is the way to go... List of screw drives - Wikipedia[^]
Simple. "Why would any modern product use a standard screw ... etc?"
No modern product would use a standard screw. Any product using a standard screw is unevolved and neanderthalian. Natural selection, in it's most intelligent up- to-date form, socially darwinistic and all/etc, dictates that the evolution of the mind of the user enables this more informed buyer to make the right decision with respect to PURCHASING the engineered product that is more highly evolved.
Economically, supply and demand takes over in this case.
To do the math with respect to the genetic algorithm that generates the extinction of the standard screwdriver will be left to the high-minded developer who has the knowledge to implement it and test in realtime the actual blip on the radar which signals that event has really passed.
In other words, extinction hasn't happened yet but venture capitalists will make sure that it does.
Unless of course what you mean by "modern" is really some clock on some Roman soldiers villa wall.