Can Someone Explain This Sign to Me?

I mean, yeah, the lower sign indicates handicapped access (though I'm not sure how this door is different from the other electronically activated one). But the lower sign? Aren't the target audience for this sign going to miss it?

While I'm rambling, what's the difference between electric and electronic? Does electronic imply semiconductors or something? As an engineer, I'm embarrassed to not have this information at my fingertips. Of course, I'm a mechanical engineer, so let me tell you a little about springs and dashpots...oh, you don't want to hear? OK. I'm not really a mechanical engineer anyway.

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