In notebook computers, having more RAM can extend battery life because storing information in RAM reduces hard drive and CD-ROM activity.

在笔记本机中，有更多的RAM可以延长电池的寿命，因为把信息存储在RAM中减少了硬盘和光盘的动作。

youdao

The player supports several types of discs including DVD-Audio, DVD-RAM, DVD-R, CD-R and CD-RW. There's also an SD Memory card slot, so you can look at photos you may have saved from a digital camera.

FORBES: Magazine Article

Like CD-RW on steroids, DVD-RAM drives can record and rewrite up to 5.2GB on one double-sided disc--more than eight times the capacity of a CD.

CNN: IDG.net - Recordable and rewritable CD drives: Permanent, portable storage

That's not such a bad deal, considering it comes with a Celeron M 420 CPU, 15-inch screen, DVD and CD burner, 512MB RAM and a 60GB hard drive.

ENGADGET: Circuit City to sell $100 Compaq laptop on Black Friday