What you need to know about scanner interfaces Your scanner connects to your PC through one of a number of possible interfaces. Which interface you choose depends on the value you place on speed.
Faster interfaces are generally more expensive.
ISA Industry Standard Architecture originated in IBM's AT computer and used to be called the AT bus. It provides a 16-bit data path between a PC's CPU and its internal expansion cards. Most computers made today include both an AT bus for slower devices and a local bus for devices that need better bus performance. Parallel Scanners, CD-ROM drives and other peripheral devices are commonly connected to a PC via the parallel port. Type I, Type II and Type III, which are 3.3mm, 5mm and 10.5mm thick, respectively.