Turn on, turn off the old computer:
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Bios, Sound signal of a bios computer
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Repeatedly pressing a computer mouse
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Computer noise, Communication room
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Opens, closes the CD / DVD tray
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Matrix printer
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Old computer keyboard
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Input error sound, Pressing a keypad
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Turn on, turn off the old computer
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Hard disk, room noise, write, read
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Fan noise, shutting, Turning on the computer
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Signal, Modem connection, interference
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The USB flash drive is inserted, removed
★★★★★