In half the time it took for the company to sell the same number of iPhones, Apple said on May 3 it sold one million of its freshly launched iPad tablet computers in just 28 days.
The millionth iPad was sold on April 30, the Cupertino, California-based firm said.
"Demand continues to exceed supply and we're working hard to get this magical product into the hands of even more customers," said Apple CEO Steve Jobs.
The level of demand in the United States alone, where the iPad launched on April 3, forced Apple to announce it would delay the tablet's international release by a month, until late May.
A second version of the iPad, featuring both Wi-Fi and 3G cellular connectivity, went on sale in the United States on April 30.
Both versions of the iPad are expected to go on sale simultaneously in late May in Australia, Canada, France, Germany, Italy, Japan, Spain, Switzerland and Britain.
At $499, the cheapest model is priced to compete directly with Amazon's popular Kindle and users can download e-books from Apple's iBookstore, as well as applications from the online "App" Store.
Apple said users had already downloaded 12 million iPad applications and 1.5 million electronic books.
Copyright 2010 The Associated Press.