In July, the company said that Apple would sell 12.9 million of the tablet computers in 2010, but has now revised its estimates to 13.8 million.
The analyst initially believed that a lack of the correct components needed for building an iPad could limit the number of units Apple could manufacture, but this restriction has now been lifted.
Rhoda Alexander, director of monitor research for the firm, said: "In addition to its traditional channels, Apple now is expanding to sell the iPad through new retailers, including Amazon, Target, Verizon and Walmart," adding that Apple has moved faster than expected in this respect.
The Apple iPad 3G offers up to 16 GB of hard drive space and provides a platform for both informing and entertaining, rather than computing.
