https://manuals.info.apple.com/ko_KR/PB_G4_15inch1.33-1.5GHz-GS.pdf
https://manuals.info.apple.com/ko_KR/PB_G4_12inch_1.33GHz_GS.pdf
https://manuals.info.apple.com/ko_KR/PowerBookG4_12inch1.5GHzUserGuide.pdf
https://manuals.info.apple.com/ko_KR/PowerBookG4_15inch1.67-1.5GHzUserGuide.pdf