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HP Prime
The HP Prime is a graphing calculator manufactured by Hewlett-Packard (HP). It contains features common in smartphones, with a touchscreen and apps available to put onto it. There are two sides to the calculator, a numeric home screen and a computer algebra system (CAS) homescreen. The calculator can quickly switch between the two, unlike its competitors, which either have a CAS model or a non-CAS model. The CAS is based on the free and open-source Xcas/Giac 1.1.2 engine by Bernard Parisse, who was also the main developer of the CAS system integrated into the HP 49G and successors. The calculator has a 1500 mAh battery, which is expected to last up to 15 hours on a single charge. Prime emulator PC software is available as well.
It has also, for now (2015), taken the title for the world's smallest CAS calculator at 18,23×8,58 cm and is also the thinnest CAS calculator available currently, with a thickness of only 1.39 cm.〔
==Exam Mode==
The HP Prime has a novel feature called ''Exam Mode''. This enables various features of the calculator (such as CAS functionality, user-created apps, notes, etc.) to be selectively disabled for a specific time, from 15 minutes to 8 hours. This can be done manually within the calculator's menus, or by using a computer with HP's connectivity software.〔(【引用サイトリンク】 url=http://www.hpcc.org/calculators/hpprime/WP_ExamMode.pdf )〕 LEDs on the top of the calculator blink to let the instructor see that the calculator is in this mode. Despite this feature, the Prime is still prohibited in many examinations, such as the US's ACT college-entry test.〔(【引用サイトリンク】 url=http://www.actstudent.org/faq/calculator.html )〕 It is however starting to be accepted in other examinations, like those run by the Dutch CvTE, the Swiss IB,〔(【引用サイトリンク】 title=HP Prime approved for International Baccalaureate (IB) )〕 or Alberta (Canada) education authorities.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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