The Bernoulli drive is a computer disk drive first developed by Iomega in 1983. A Bernoulli drive is just like a floppy diskette; however, the internal disk is much more rugged, runs faster, and holds more data. However, these disks are still not as fast as a hard drive. Bernoulli disks were available in 5, 10, and 20 MB size and was even available up to 230 MB. This drive was later replaced by the Iomega Jaz drive and Zip drive.