For communicating with peripheral devices.
PS2 style plugs were used prior to USB style plugs.
A Computer Bus is usually the USB Ports, and there used for USB Plugging things.
The only parallel to USB adapter I've seen is one which allows you to hook up a parallel printer to a USB port on the computer. You could not use that manner to create USB ports.
They are used to add USB 2.0 ports to a computer that was not originally equipped with them.
Typically USB ports are used
iPads do have usb ports. You just have to buy an adapter
This Panasonic Toughbook has 3 USB ports.
There is no minimum or required number for USB ports on a laptop. Depending on the age and design of the laptop, it could be anywhere from zero to ten. I have seen only 2 USB ports on older laptops, most of the new ones atleast have 4 USB ports. Netbooks(10" & 11") have not more than 2 USB ports. If in anycase you need more USB ports, you could buy an USB hub for as less as 10$, which will add 4 more ports to your laptop.
The USB ports on a ps2 which there are only 2 can be used for accesing things like, Singstar Microphone's, eyetoy usb cameras, internet options wireless options, racing controlls.etc The USB ports on a ps2 which there are only 2 can be used for accesing things like, Singstar Microphone's, eyetoy usb cameras, internet options wireless options, racing controlls.etc
Who told you it had no USB ports? Of course it has USB ports. The iMac has 4 USB ports, 1 Firewire port, 1 Thunderbolt port (2 on the 27" iMac), 1 Ethernet port.
Maybe linking it to a computer =P
The Atom N270 laptop has three USB 2.0 ports.