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PowerBook - Wikipedia
Apple's PowerBook reinvented the laptop thirty years ago
PowerBook G4 - Wikipedia
HP ProBook Laptops | HP® Store
The evolution of Apple’s laptops, from the PowerBook to ... - Macworld
PowerBook 100 - Wikipedia
Apple PowerBook G4 (12-inch review: Apple PowerBook G4 (12-inch
Apple 15-inch PowerBook G4 review: Apple 15-inch PowerBook G4
Today in Apple history: PowerBook 100 series is a smash hit
PowerBook - Apple Wiki