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PowerBook G3
The PowerBook G3 is a line of laptop Macintosh computers produced by Apple Computer between 1997 and 2001. It was the first laptop to use the PowerPC G3 (PPC740/750) series of microprocessors. It was succeeded by the Titanium PowerBook G4 line in 2001, which used the PowerPC G4 (PPC74xx) series of microprocessors.
==PowerBook G3 (Kanga)==
The first Macintosh PowerBook G3, code-named "Kanga," was introduced in November 1997. At the time of its introduction, the PowerBook G3 was advertised as the fastest notebook computer available (a title formerly held by its predecessor, the 240 MHz PPC-603ev-based PowerBook 3400c). This model was based on the PowerBook 3400c, and was unofficially known as the PowerBook 3500. It used the same case as the 3400c, and a very similar motherboard. The motherboard was upclocked from 40 MHz to 50 MHz, resulting in some incompatibility with older 3400 RAM modules. Other changes to the motherboard included doubling the on-board RAM from 16 MB to 32 MB, and a faster version of the on-board Chips and Technologies graphics controller. The G3 made the Kanga more than twice as fast as a 3400c,〔(【引用サイトリンク】title=Macintosh Performance Comparisons - Prototypes )〕 and the improved graphics controller allowed it to refresh the screen 74 percent faster.〔(【引用サイトリンク】title=PowerBook 1400, Kanga, and WallStreet Reflections )〕
This first PowerBook G3 shipped with a 250 MHz G3 processor and a 12.1" TFT SVGA LCD. It is the only G3 system that is not officially compatible with Mac OS X (though various methods not sanctioned by Apple can be used to install OS X). The Kanga was on the market for less than 5 months, and is largely regarded as a stopgap system that allowed Apple to ship G3 PowerBooks sooner, while Apple prepared its more revolutionary PowerBook G3 Series. As a result, the Kanga has the dubious distinction of being Apple's fastest depreciating PowerBook. Nevertheless, many people chose to purchase a Kanga to continue using their interchangeable expansion bay modules, batteries, and other peripherals from the Powerbook 190, 5300 and 3400 models. The Kanga was also notably smaller in depth and width than the subsequent Wallstreet Powerbooks, and the Kanga remained the smallest-when-open G3 laptop until the debut of the Apple iBook some years later.
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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