The article also makes it sound like TI released the first graphing calculator in 1990. In fact, HP did that a full 3 years earlier. http://en.wikipedia.org/wi

The article also makes it sound like TI released the first graphing calculator in 1990. In fact, HP did that a full 3 years earlier. http://en.wikipedia.org/wiki/HP-28C http://en.wikipedia.org/wiki/HP-28C I much preferred programming the HP-28 (and later the HP-48G) to the TI-8x series. An RPN language is a natural extension of the calculator interface, while a BASIC interpreter always felt like a weird bolt-on.