It’s probably (was?) the biggest commercial event in the Netherlands and it’s the HCC days (via Alfons).
And to be honest, I have no idea what to think of it. In the late Eighties, early Nineties, we literally embarked on those trips to the Jaarbeurs. Exchanging ideas, conversations and tips: it was almost second nature of the HCC groups. They probably still do it, but the glamour has gone. Actually it was always fun to walk by the BBSes and meet the guys we needed to meet and make the obligatory pictures. And back in those days, I remember the cheer parade when every major compiler maker drummed up support for their latest compiler.
Have fun and be careful out there. You never know, nowadays.