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The computer uses a 1.8-inch disk drive, on which no more than 80 gigabytes of data can be stored. Memory is limited to a standard two gigabytes of RAM and its processor is slower than those of Apple’s other laptops. The design team jettisoned an optical disk storage device for playing DVDs. Mr. Jobs demonstrated a feature called Remote Disk that will make it possible to play the contents of a DVD via a wireless network from another Macintosh or Windows PC. Also, the MacBook Air’s battery is not removable.