USB connector
The Universal Serial Bus (USB) has been a standard port on Macintosh computers since the debut of the original iMac in 1998.
There are two connector types that are both USB. They are denoted USB Type A and USB Type B. USB Type A is used to connect to the host machine including, but not limited to, your computer, or an upstream hub.
The USB Type B plug (shown below) is used to connect to the USB peripheral device. It is probably more common, since you will see it on more cables.
As of this writing, the current standard on Macintosh computers is USB 1.1. Its data speed is rated at a maximum of 12 Mbps.
A newer standard, USB 2.0, is capable of transfers of up to 480 Mbps. Today, there is no native Macintosh hardware support for the USB 2.0 standard. There are, however, upgrade cards and software to provide support for USB 2.0 as an add-in for some Macintosh models.
