This is a question about the history of electronic symbols and standards.

I'm finally starting to learn how discrete devices actually work from the entertaining yet incredibly insightful and informative ElectroBOOM videos. In This CHIP Changed the WORLD! MOSFET (ElectroBOOM101 - 012)

We have N-channel and P-channel MOSFETs, with very old, basic symbols like these, with arrows on the source differentiating the types.

(I'm) not sure what the arrows are showing because when the transistors are on, the current can flow in either direction.

Anyway, the new updated symbols are - a bit more confusing, but at least they show the substrate tied to the source terminal, so you know what you're dealing with. (I'm) not sure what the arrow symbolizes. Anyway...

I'd like to know the history of these two sets of symbols - who (what person, or if necessary at least what organization) created the early set, and likewise for the revised set, and if possible the corresponding years.

This is a question about the history of electronic symbols and standards.

I'm finally starting to learn how discrete devices actually work from the entertaining yet incredibly insightful and informative ElectroBOOM videos. In This CHIP Changed the WORLD! MOSFET (ElectroBOOM101 - 012)

We have N-channel and P-channel MOSFETs, with very old, basic symbols like these, with arrows on the source differentiating the types.

(I'm) not sure what the arrows are showing because when the transistors are on, the current can flow in either direction.

Anyway, the new updated symbols are - a bit more confusing, but at least they show the substrate tied to the source terminal, so you know what you're dealing with. (I'm) not sure what the arrow symbolizes. Anyway...

Later, at about 09:18 in the video, discussing the significance of the body diode, the most complete and complex diagrams for MOSFETs are shown:

Thinking about it, maybe that's what the arrow in the MOSFET symbol is trying to show.

Question: I'd like to know the history of these three sets of symbols - who (what person, or if necessary at least what organization) created the early set, and likewise for the revised set, and if possible the corresponding years.