The archival exhibit shows other Sony products that have been discontinued or lost out to competition over the years _ the Betamax video cassette recorder, the Trinitron TV, the Aibo dog-shaped robotic pet.
The Walkman exhibit, which runs through Dec. 25, shows models that are still on sale, some about the size of a lighter that play digital music files.
Also showcased are messages from Morita and his partner Masaru Ibuka, who always insisted a company could never hope to be a winner by imitating rivals but only by dashing stereotypes.
"All we can do is keep going at it, selling our Walkman, one at a time," said Sony spokeswoman Yuki Kobayashi. "Thirty years is a milestone for Sony. But we hope the Walkman won't be seen as just a piece of history."
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On the Net:
Sony's history: http://www.sony.net/Fun/SH/

















































