The HP Xpander (F1903A) aka "Endeavour" was to be Hewlett-Packard's newest graphing calculator in 2002, but the project was cancelled in November 2001 months before it was scheduled to go into production. It had both a keyboard and a pen-based interface, measured 162.6 mm by 88.9 mm by 22.9 mm, with a large grayscale screen, and ran on two rechargeable AA batteries. It had a semi-translucent green cover on a gray case and an expansion slot. The underlying operating system was Windows CE 3.0. It had 8 MB RAM, 16 MB ROM, a geometry application, a 240×320 display, a Hitachi SH3 processor, and e-lessons. One of the obvious omissions in the Xpander was the lack of a computer algebra system (CAS). Math Xpander After discontinuing the Xpander, HP decided to release the Xpander software, named the Math Xpander, as a free-of-charge application that ran on Windows CE-based Pocket PC devices. It was hosted by Saltire Software, who had been involved in its design. See also List of Hewlett-Packard products: Pocket calculators HP calculators Casio ClassPad 300 — a similar device by Casio TI PLT SHH1 HP Jornada X25 References External links HP Xpander at hpmuseum.org HP Xpander at hpcalc.org HP Xpander at rskey.org HP Xpander at evilmadscientist.com Math Xpander user's guide Graphing calculators Windows CE devices xpander