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한국산업경영시스템학회지
(Journal of Society of Korea Industrial and Systems Engineering)
Vol. 30 No. 2 (2007.06)
pp.15-22
pp.15-22
한국산업경영시스템학회
(Society of Korea Industrial and Systems Engineering)
초록
By the early 20 century, “workman” introduced by SONY was the leading portable analog sounder. However, at the same century, workman was pushed out from the portable sounder by iRiver developed by MPMAN.COM. This portable digital sounder is called MP3-P
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