
There are many types of fasteners available in the marketplace. Selecting the right type of fastener often depends on the job to be accomplished. Each type of fastener often has a matched screwdriver head type.

There are many types of fasteners available in the marketplace. Selecting the right type of fastener often depends on the job to be accomplished. Each type of fastener often has a matched screwdriver head type.
Don't forget 'Tri-lobial', as used to screw the lids down on small aluminium boxes. I think the RS and Farnell ones are available with Posidriv heads. My nearly-new Triumph motor-cycle has lots of Torx, some with a bead of Loc-Tite in a shallow groove along the shank, that combination will stall a reasonable-sized electric drill even when the bit is fully located in the screw head (as it should always be). You know that your drill was not big enough when the smoke escapes.
I'm pretty sure screwdrivers shouldn't have a head. Also known in Britain as "vodka and orange", one simply pours the ingredients gently over ice in a tall glass.
if it has to be Phillips.
Advantage of Posidriv over Phillips, is that a slow turning powertool will grab into a Posidriv, but not in a Phillips.
At a production line, it means that you can get grip by giving the machine a little oomph. With a Phillips it will skip over. You have to align the bit somewhat when attacking a Phillips.
A Posidriv screw also sits better on a magnetic screwdriver, if you have to reach deep to mount a screw.
When I worked at a truck assembly plant (DAF Trucks in Oevel, Belgium), it was Posidriv all the way. Except exceptions .
These are actually easy to use with powered tools, once you get the hang of it.
At the end of my stint there they started to use Torx, That has advantages, but it's harder to get the bit of a powertool removed once the screw is tightened, Tends to "stick/bite" a little.
edit meanwhile:


that don't use a slot.
Amen to that! Those are the worst!
But slotted screwdrivers are handy when the Phillips hole is stripped - use a dremel to create a slot and you get a second chance.
I'm going to answer a different question : )
I really like Wiha System 6 interchangeable tip screwdrivers - nice large range of tips. But prices have more than doubled so it's not very viable any more. I purchased more than 10 years ago, and they're still going strong.
But a very close second for me are Vessel screwdrivers - they have JIS compatible drivers (which fit Japanese equipment well, if you're doing consumer electronics repairs, but also appear to fit normal Philips screws quite effectively too). A lot more affordable.
I've tried 'Megadora' and their ball-handle screwdriver (which are super-comfortable to grip). Not been disappointed so far.