Okay, this is what I know so far. (I think.)
A three-piece PV has a battery, an atomizer, a cartridge which holds e-juice.
A cartomizer is an atomizer with a built-in cartridge. Some are marketed as throw-aways, but, as vapers are a very frugal and inventive lot, the cap at the top can be prised off with a paperclip and the cartomizer can be refilled until the fiber inside is done-for. From what I've read, this becomes rather apparent.
A clear-o-mizer is a cartomizer (atomizer/cartridge combo), but has a little window that indicates just how full that cartomizer is so that you don't dry it out, which is also an unpleasant experience, I gather.
The Tank (eGo-T and Inferno-T) consists of a special atomizer that has a piece much like a hollow needle inside that holds a wick. A mouthpiece, shaped like the end of Grandpa's old cigars with the plastic tip (called a "whistle tip") is inserted into the atomizer, and the needle-like piece punctures the cap at the wide end of the mouthpiece and allows the juice (with which you've filled the tank with e-juice by popping the cap off and then on again), to wick down into the atomizer.
I started with the standard 3-piece, then switched to the tank system (compatible with a 510 battery) because, having parrots, I didn't want to be handling nicotine juice and accidentally poisoning them through skin contact. It allows me to have as little contact with the e-juice as possible.
I have no idea what the screwdrivers are about (batteries and voltage?), nor the juice boxes (non-stop juice drop?), nor am I particularly inclined to link a car battery to a 100 gallon drum in order to have an Alice In Wonderland caterpillar-esque vaping experience. (I just made up the latter. I hope.)
That's about all I know. Well, I may know a little more, but my husband's a Freemason and some things just can't be repeated. I'm sure you understand. *winkwink*