iPads do have usb ports. You just have to buy an adapter
USB ports, unlikely. Mac OS X, no this is impossible as the iPad is not a Macintosh.
The apple iPad. Very versatile but no USB ports.
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.
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.
NoYou can open the computer up and remove the USB ports.
The Atom N270 laptop has three USB 2.0 ports.
A USB hub can be attached to any of the existing USB ports to provide additional connectors.
Well depending on what usb ports it has usb 3 ports are the best to use.
Onboard USB are USB ports built into the motherboard.
a USB hub
Your iPad came with a usb cord that attaches to your iPad with the big end and the other end (the one with the usb plug in) goes into your usb slot on your computer.