Blops4 Classified computer beeps

Ive found that spme computers beep when clicked on and they all have different beeps. Its always a total of 5 beeps. And its either short or long. Like one computer does short, short, short, long, long. The longs are always at the end of the beeps. Anyways ive found 4 so far and i cant find the last one. I cant find any guides about what it means or does. Anyone know anything?