All that stuff, which I assume is accurate, is much more recent than my faulty memory allows. On the other hand, /jk isn't listed and I never see anyone else use it, and it isn't nearly as good as /j, so I probably invented it, and it's just as prestigious as inventing a a pasta pot with the colander holes conveniently located on the bottom so that it can't hold water.
Also, I was reminded of something else I was wrong about when I followed one of the article's references, which is that I always assumed that elevators were made unbalanced so that if the cable broke it would wedge itself in the shaft instead of falling. Nope, they just fall all the way to the ground, as has unfortunately been proven recently. No idea why I thought they were unbalanced. If I had known that, I would have demanded a ground floor office when I worked in a 29 story building, and it had the oldest, worst elevator I've ever seen. When you went down, it felt like you were on a rollercoaster with that odd feeling in your stomach, and when it went up, it took forever, and no matter which direction you went, it made godawful screeching sounds like you just disturbed a huge nest of harpies. I always pictured the hunchback of Notre-Dame standing at the top of the shaft struggling to turn a wheel and gear mechanism that hadn't been greased in 100 years.
I don't think so, but I've been over 30 hours without sleep, so what do I know. It may have been around before I used it, but I hadn't seen it yet. I really think that with something like this, something that's just simple and obvious, that it could have originated with a bunch of different people once they became familiar with indicators. It's not so much that it was invented, It was always an available tool, people just hadn't picked it up yet.I have seen "jk" being used without the forward slash quite often, maybe you just added the slash because it felt like a tone indicator to you.