Actually RG, which might have stood for Radio Guide, was a military standard which dates back to before WWII.

RG spec cables are still manufactured however technology has allowed us to produce better and more efficient cables that are better suited for the uses we have today.

These cables designs naturally won't comply with any of the old RG specs which haven't been updated since probably the 50's. About the only similarity to the old RG designs is the physical size and many manufacturers will use it as a reference when manufacturing and categorizing their cables.

Thus cables today are described as RG-* size, type, style or series unless it's an one of the original RG spec designs.

-Hal

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