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lifetime_of_technology's Introduction

技術の寿命

電子技術

  • 真空管:64年(1906-1970) 真空管ラジオがほぼ終了
  • ブラウン管:78年(1927-2005) 液晶TVがブラウン管を抜く
  • ベータマックス:27年(1975-2002)生産終了発表
  • レーザーディスク:33年(1974-2007) 製造中止
  • VHD:6年(1983-1989)
  • MD:18年(1992-2010)ほぼフラッシュメモリに置換

コンピュータ技術

  • 紙テープ:124年(1846-1970)
  • オープンリール磁気テープ:34年(1950-1984) IBMが生産中止
  • フロッピーディスク:40年(1971-2011)ソニーが生産中止

生活技術

  • マッチ:164年(1855-2019) 平成終わる
  • 馬車:約4700年(2800BC-1920)
  • 蒸気機関車:174年(1802-1876)国内での通常運用停止
  • オイルランプ:?
  • かまど:?

建築・土木

  • 鉛配管:約2000年(1世紀〜20世紀)
  • 茅葺屋根:?
  • 漆喰:?
  • 石橋:?

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