if the laptop/desktop have a wirless adapter - which most have now - then you connect to your router the same way you connect you ps3 and phone to the wireless network
http://support.apple.com/en-gb/HT201505
http://smallbusiness.chron.com/conne...nal-32479.html
http://support.apple.com/en-gb/HT201505
http://smallbusiness.chron.com/conne...nal-32479.html