USB and FireWire:

USB : Short for Universal Serial Bus, an external bus standard that supports data transfer rates of 12 Mbps. A single USB port can be used to connect up to 127 peripheral devices, such as mice, modems, and keyboards. USB also supports Plug-and-Play installation and hot plugging.

FIREWIRE : A very fast external bus standard that supports data transfer rates of up to 400Mbps (in 1394a) and 800Mbps (in 1394b). Products supporting the 1394 standard go under different names, depending on the company. Apple, which originally developed the technology, uses the trademarked name FireWire. Other companies use other names, such as i.link and Lynx, to describe their 1394 products. Parts4Pc provides a full range of USB Adapters, USB Auto Switch Boxes, USB and Firewire Cabels, Card Readers, Converters, Cpu Fans, Hubs, I/O Cards, Input Devices, Ipod, KVM Products, Pointing Devices, Video Devices.