How did it become your thread?
OK, I have a confession to make; I didn't read this thread very carefully. Sorry, I'm usually pretty fastidious when I go through these. I blame the Alabama heat for my lack of attention span. I've never heard an Engineer in the US use that term before. I've only seen it on this forum. But that might be because I've only done digital logic design for the last 14 years. The last time I held an SCR was when I was an Engineering Technician, back in the 80's.