Gun pills: why is it called a .38 Special?

Why the .38 Special is defined as "Special", and is  a .38, even if it shoots a .357 caliber bullet?

Not that we do away with .38 special but why don't firearm makers

GUNS Magazine Big Bore Belly Guns Part II - GUNS Magazine

Revolver vs. Pistol: Case Closed

Military, Page 3

5.11 Kubaton: the tactical pen for everyone

5.11 Kubaton: the tactical pen for everyone

Profile of a Cartridge: History and Development of the 38 Special

A History of the Iconic .38 Special - The Shooter's Log

5.11 Kubaton: the tactical pen for everyone

Does a .38 special have enough punch to kill a man? - Quora

The .45 Colt Cartridge Today - Firearms News