PC Card
According to the original documentation, Pocket Zip USB and PC Card work with Windows 95, Windows 98/98SE and Windows NT 4.0. Iomega provided USB mass storage support for Windows 95 with at least OSR2 (4.00.950B) for use with its Zip products. Under Windows NT 4, Pocket Zip PC Card only works with certain PC Card controllers (which ones are not named by Iomega). Pocket Zip USB also works with Mac OS 8.x, but the PC card version is specified as not working with Apple computers.