Office work, typewriter, environmental sounds:
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Laser printer
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Modem connection, signal, interference
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Sound signal of a bios computer, bios
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Manual copy machine
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Turn on, turn off the hard drive
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Turn on, turn off the old computer
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Matrix printer
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Computer mouse movement
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Hard disk, room noise, read, write
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Environmental sounds, typewriter, Office work
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Computer interface, signal read information
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Pressing a keypad, input error sound
★★★★★