A device typically used to generate random numbers in computing is a random number generator (RNG). RNGs can be hardware-based or software-based; hardware RNGs use physical phenomena (like electronic noise) to create randomness, while software RNGs utilize algorithms to produce pseudorandom numbers. These are essential in various applications, including cryptography, gaming, and statistical sampling. The quality of randomness generated can significantly impact the effectiveness of these applications, making RNG choice important in software design.