Most come with pass-through connectors to attach your printer to the scanner, just don't try to use both at once. Most high-end scanners, however, connect via a SCSI port. This type of connection is fast but can require more work to configure and install. Macs support SCSI connection but many PC's do not. If you want to get a SCSI scanner then you may have to open up your computer to install a SCSI controller card.
Most SCSI scanners come with controller cards and SCSI cables.
Even if you already have a SCSI card for another device, it may not be compatible with the scanner or the provided cables. All this bother will pay off if speed is a primary concern for you. Speed demons should also consider high-end scanners that support FireWire which is akin to USB but even faster. Memory and Storage To put to plainly, images can devour available hard disk space, especially if you need to store high quality versions. The common formats for saving images like JPEG and GIF compress files but loose information in the process.