Symbionese Liberation Army?
And if you don't know what that means, you are too young!
Seriously though, Service Load Amps. It is another seldom used way of adding the Service Factor into the rating. It was most often used for OEM motors where the motor mfgr was selling a standard design motor, knowing full well that the OEM was going to run it continuously into the service factor. I imagine they did it to try and avoid the service calls from people thinking the motor was running at too high of current ("over amping" as someone put it in this forum not too long ago!).
I haven't seen that used in a long time though. Is that an older motor?
"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more."
Nikola Tesla