Here we go again with the revolvers aren't pistols thing. An early Colt ad called them pistols. Various dictionaries call revolvers "pistols". Pistols are handguns regardless of the mechanism they use.
Then add in things like the Webley Fosbery and it gets even more interesting.
If you look up the definition of 'pistol', you will often get the laymans definition, where they use nd interchange the term pistol for handgun. This has a lot to do with the term has been misued for over 100 years, especially in the movies and TV shows. But if you really research the term you will find that it is a handgun that shoots the projectile from the barrel, and stems from way back when all guns (handguns as were as long guns) were all muzzle loaded. Furthermore, ALL handgun and ammo manufacturers in the US never call revolvers with the term pistol or list revolvers or revolver ammo under the pistol category. They know what the terms really mean and their origin, and use them 'correctly'.
Also, unfortunately, to add to this misconception, a lot of retailers of guns AND ammo use the term 'pistol' loosely, to mean handgun. But there are two separate terms for a reason, which a lot of people tend to ignore. I have a ballistics file that covers 35 handgun calibers of ammo (and 25 rifle ones also), and in trying to keep it 'up-to-date' (each of the over 3,500 entries in this file, each which is a link to ammo to buy online) I get a lot of email from many online retailers everyday (10-15). I am constantly emailing them when they use the term 'pistol' in their website to mean handgun, which is a very simple change for them to make for their website to be more 'correct'.
Some of them respond and make their website correction(s), and others just ignore my comment, thinking either that they 'know' better, or that they simply do not care.. But when I go online, looking either for a particular type of gun or ammo, I DO care, and I have zero interest in looking at their long listing of pistols when I am looking for a revolver or revolver ammo (I am on the lookout for a Ruger Redhawk DA revolver in the .45 caliber, which includes a .454 revolver.) This is just poor website management on their part, and also shows their ignorance. Again, all handgun and ammo manufacturers in the US do not make this mistake/confusion.
By the way, for the past 5 years or so, 85% of all handguns manufactured in the US are pistols, and the other 15% are revolvers, so comments often made about revolvers dying out are simply not true. This percentage has been steady across all five years. I did not research prior to the past 5 years. I suspect that the manufacture of handguns outside the US will have a much higher pistol manufacturing percentage. This US level of revolver manufacturing has been steady, and I contend that this is due to several fators, of which one main one is that is you want power in a handgun, it needs to essentially be a revolver (with the excpetion of the Desert Eagle pistols chambered in revolver calibers).