Let's take Dell Computer as an example. Dell's headquarter is in Austin, Texas. Their manufacturing base for North and South America is in Austin, for Europe in Ireland, for Asia in Malaysia. All of Dell's PCs are sold through direct sales using no retail stores. Purchasers go to the Dell homepage, combine the products that they need, and order it.
All necessary software is installed beforehand.
Payment is done through credit card. The PCs catered towards each customer's request are made in the above mentioned three factories, and delivered in just a couple of days by Federal Express. Since the products are set up in accordance to customer order, there is no risk of stock due to estimated production. Dell's factory in Penang Island, Malaysia, stands right next to Federal Express's airport. After pick-up, the products are immediately shipped to Federal Express' hub airport in the Philippines, and sent to all of Asia including Japan.