Did You Know?
Rats, mice, and other rodents communicate not just in the range of sound frequencies humans can hear (approximately 20-23,000 Hz), but in ultrasonic frequencies as high as 91,000 Hz. There is even evidence that some species, such as the brown rat, use ultrasound for echolocation.
Today's Term
Impact Printer
An Impact Printer is a printer that functions by banging a head/needle against a ribbon, thus transferring the appropriate characters onto the paper.
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