…would be less confusing. It occurs to me that our hobby is full of ambiguous terms which have been used for several different things, so that it is not all that easy sometimes to know what one is talking about. Some examples:
Fairbanks-Morse named their H2466 locomotive the “Train Master”. Lionel made a model of it. Lionel named their transformer line “Trainmaster”. Lionel then came out with TMCC, with the “TM” standing for, what else?
O27 can mean the diameter of the track. Or the rail profile, whether straight or curved in some other diameter.
There are at least three “O” scale-gauge combinations in American and two more used in Europe.
Some folks (You know who you are) like to use “PW” both for “prewar” and for “postwar”. Sometimes you can tell from the context which they mean.
Lionel made three ZW transformers. The last one is very different from the others.
Lionel loved the model number “400”, starting with a 2 7/8-inch-gauge gon in 1901. It was a set number in 1915, a standard-gauge locomotive in 1931, and finally an RDC in 1956.
“Pull-Mor” was originally American Flyer’s traction-tire scheme. Now it is what Lionel calls its open-frame 3-pole universal motors.
Anyone have any more?