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Yes
by connecting with via usb PS3 can not connect to the internet with a USB modem
Yes via USB. Most wireless keyboards will also work. You can also connect bluetooth headset to PS3 too as well.
easy. its called wifi
pashto sobgs
No
It can connect to printers and the internet with WiFi, headsets, speakers, keyboards and footswitches with Bluetooth. It can also act as a controller for other devices or be controlled via Wifi and Bluetooth. It can connect to digital cameras for importing via USB, and connect to external microphones and keyboards via USB.
Sadly, you cannot connect to the internet via Bluetooth with the fourth generation iPod Touch. You must have a Wi-Fi connection to access the internet.
Unless the printer can be connected via airport which is doubtful you cannot. You can however connect it via WiFi or by Bluetooth if you printer is Bluetooth ready or with a Bluetooth device if it is Bluetooth compatible. Your Mac is Bluetooth ready.
To use a Bluetooth dongle, it must first be plugged into the USB drive of a computer. After it is opened in the control panel on the computer, it is ready for use.
If the PS3 is already wireless then it should connect to any internet network via a wireless router. Sony's PS3 support site has all the information you need for your setup.
You need to make sure that your laptop can forward network to the bluetooth (which is not likely).