Calculator Wars at your School

[KCC]

Maybe you would want to know calculator war in another part of the world, i.e. Hong Kong.
I was in my high school in mid to late eighties, and in fact, there was no calculator wars, because there was only one big nation, i.e. Casio, which conquered 90% of the market, with the remaining 10% being Sharp. Then in around 1990 HP tried to enter the market, promoting HP-20S and HP-22S. I remembered in one of its advertisements it asked students to solve something like 'x + sin x =2', and which of course could not be easily solved by hand but HP Solve could handle that easily. It was at that time I started to know there was a calculator brand called HP, and then fell in love with it. And where is TI? Sorry, never heard of that during my whole life as student.