The iPad was announced on January 27, 2010, by Steve Jobs at an Apple press conference in San Francisco.
He later said that Apple had begun developing the iPad before the iPhone, but had temporarily shelved the effort upon realizing that its ideas would work just as well in a mobile phone. The iPad's internal codename was K48, which was revealed in the court case surrounding leaking of iPad information before launch.
Apple began taking pre-orders for the first-generation iPad on March 12, 2010.[3] The only major change to the device between its announcement and being available to pre-order was the change of the behavior of the side switch to perform either sound muting or screen rotation locking (user selectable).