USB-B (a square connector commonly used with printers, external hard drives, and larger devices) or smaller connectors such as the Mini-USB and Micro-USB
Though not that common, A-A cables are used to connect USB devices with an A-style Female port to a PC or another USB device, and for data transfer between two computer systems. Note: Typically an A-A cable is not intended to connect two computers together or to connect a USB hub between two computers. USB 3.0 is backward-compatible, so you can plug in USB 2.0 devices, but you’ll get only USB 2.0 speeds. Also, USB 3.0 cables are different than earlier USB cables, so be sure to get the right cable type for your USB 3.0 device, if your spiffy SuperSpeed USB gizmo didn’t include a cable in the box. Standard USB 2.0 ports. USB 2.0 is the standard port type. These days, mice, keyboards, hard drives, optical drives, printers, and just about anything else can be found in a USB 2.0 flavor to plug into one of these ports. USB Type-B. Typically, the Type-B connector is the other end of a standard USB cable that plugs into peripheral device (such as a printer, a phone, or an external hard drive). It's also known as Type B-male. On the peripheral device, the USB port is called Type B-female. USB 3.0 Cables. Devices that use the USB 3.0 revision of Micro-A and Micro-B ports feature a double-socketed connection port. Both Type-A and Type-B still use different connection standards. Printers and some other devices may use smaller types of USB ports including a standard called USB-A. To connect a device having USB-B ports to a device with another type, simply use the correct type of cable with appropriate interfaces on each end. Learn how to identify the different types of USB ports, which allow connections to printers, scanners and other essential devices. For the most part, there are two types of connectors on USB cables: a long, flat rectangle for plugging into computers and hubs called 'USB-A', and a smaller, square connector for plugging into devices like external CD and Hard drives, scanners, and printers called 'USB-B'. The other end of the USB cable may have different connectors including USB-B (a square connector commonly used with printers, external hard drives, and larger devices) or smaller connectors such as the Mini-USB and Micro-USB that are commonly used with portable devices such as media players and phones.
http://www.cablestogo.com/learning/connector-guides/usb http://www.pcworld.com/article/250557/multiple_ports_on_your_pc_what_do_they_do_for_you_.html http://www.pcworld.com/article/250557/multiple_ports_on_your_pc_what_do_they_do_for_you_.html http://www.cnet.com/news/usb-type-c-one-cable-to-connect-them-all/ http://everydaylife.globalpost.com/types-micro-usb-cables-31662.html http://compnetworking.about.com/od/usbnetworking/p/usb-port.htm http://www.ehow.com/how_4987801_identify-types-usb-ports.html http://www.datapro.net/techinfo/usb_info.html http://www.labnol.org/gadgets/visual-guide-to-computer-cables-connectors/10694/
different types of usb ports