When IBM chief maintenance engineer Jóhann Gunnarsson started tinkering with the IBM 1401 Data Processing System, believed to have been the first computer to arrive in his native Iceland in 1964, he noticed an electromagnetic leak from the machine's memory caused a deep, cellolike hum to come from nearby AM radios.

It was a production defect but, captivated, amateur musician Gunnarson and his colleagues soon learned how to reprogram the room-size business workhorse's innards to emit melodies that rank amongst the earliest in a long line of Scandinavian digital music.

• Official Site: A User's Manual
  
• Wired Article: IBM 1401 Mainframe, the Musical

via gizmodo

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