Unlike internal card solutions, USB technology, basically a dual directional, high-speed serial connection that links peripheral devices, is simple to install and cost-effective. This involves a certain degree of technical savvy, because adding a card requires opening the computer’s chassis, installing the card, reconfiguring the system and rebooting the PC. Traditionally, adding extra ports to connect serial interface devices like receipt printers, bar-code scanners, monitors, pole displays and magnetic stripe readers meant installing additional ISA or PCI cards. In comparing ISA, PCI and USB, the key differentiator is ease of installation. Industry Standard Architecture (ISA), Peripheral Component Interconnect (PCI) and Universal Serial Bus (USB) are the three busses commonly used in today’s PC, thin client or server applications. The I/O bus, or peripheral bus, is the pathway that joins peripheral devices to a PC. USB technology is a no-hassle, cost-effective alternative to PCI or ISA bus expansion for peripheral device connectivity.Īs Personal Computers (PCs) continue to decrease in size and become more streamlined, the input/output (I/O) slots have virtually disappeared, posing a challenge for applications like point-of-sale (POS) that require the connection of multiple peripheral devices.
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