A 3.5" removable disk drive from Iomega. Zip disks come in 100MB, 250MB and 750MB varieties, with the latter introduced in 2002 using USB and FireWire interfaces. The 250MB drives, introduced in 1998, also read and write 100MB disks. The 750MB drives read all, but only write 250MB and 750MB disks.

Zip disks are a floppy-like technology that uses design concepts from hard disks and Iomega's earlier Bernoulli disks. The drive is bundled with software that can catalog the disks and lock the files for security. When Zip disks were introduced in 1995, they became popular very quickly. See Bernoulli box.