MIMPS? crown Transistor matching

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I had a conversation the other day with a Tech at Crown audio. I asked them how they match there transistors as they are all inked with a number code. He wasn't sure but said that Motorola helped them design the tester that they use. and that they match for Beta and thermal characteristics???

I did some googling and didn't find much info but did find a reference to a Motorola computer program called MIMP???? anyone heard of it?
 
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