The original iMac 233MHz did not have Firewire, only the later "DV" (digital video) models did. But it had USB (instead of ADB), and the Iomega Zip 100MB drives

The original iMac 233MHz did not have Firewire, only the later "DV" (digital video) models did. But it had USB (instead of ADB), and the Iomega Zip 100MB drives were a popular alternative to floppy disks for personal use. New Mac-compatible software was already available on CDs, so the lack of a CD burner or floppy drive was not actually that much of an issue in practice.