PowerBook G4 (15英寸双层SD)

The PowerBook G4 (15-inch Dual Layer SD) is a high-performance laptop introduced by Apple in 2003, featuring a PowerPC G4 processor and a 15-inch display, equipped with a dual-layer SuperDrive optical drive supporting CD-RW and DVD-ROM reading. Its powerful graphics performance and portability made it an ideal choice for professional users at the time, marking an important milestone in the evolution of Apple's laptop lineup.