I don't necessarily mean adult as in NSFW.
I'd probably bring in my RG280V. It was my first handheld emulator. I had emulated games on my phone in the past and even used a Bluetooth controller but playing on it felt different. More real in a way.
I grew up with the Game Boy so the idea of having thousands of games on the go is pretty neat to me.
I've since moved on to the RG405M.
What about you? Do you have anything neat or special to you that you could talk about for a couple minutes?
Would love to see photos as well
Never used that myself. There are many programs we use depending on what property you are looking to calculate. I'd say the main tool is HFSS. I personally used CST mostly because when I was learning all of the licenses were usually in use and CST was always available since it was not as well known. But seriously, I'd estimate there are literally dozens of programs plus programs that each of us writes, usually in Matlab.
That might be the barrier. I seem to remember NEC2 was the only game in town for amateur use, which is why I have it installed. It's the only thing I've used that still expects punch cards.