Magazines vs Clips

[SAnd]

I have a manual from 1918 for the "United States Rifle, Caliber.30, Model of 1917" says "The magazine is directly beneath the bolt and is loaded from the top from a clip of five cartridges while the bolt is retracted."
There is a pdf description of the "Automatic Pistol, Caliber .45, Model of 1911" 1914 revision, available on the internet. It says "The receiver has suitable guides for the reciprocating slide and a hollow handle in which the magazine is inserted from below and is locked in place by the magazine catch,...
So the official mane for the removable magazines goes back to at least 1914 for the 1911 Pistol.
I'll speculate that the clip / magazine thing probably happened it the World War II era when a bunch of GIs were trained on mainly rifles that used clips for ammunition supply and it bled over to the other guns that used detachable magazines.