Simplify the following text for a Grade 4 native English-speaking person.
Original: In 2007 , ACCESS introduced the successor to Garnet OS , called Access Linux Platform and in 2009 , the main licensee of Palm OS , Palm , Inc. , switched from Palm OS to webOS for their forthcoming devices . Palm OS was originally developed under the direction of Jeff Hawkins at Palm Computing , Inc. .
Simplified: Palm OS was first released in 1996 , when the Palm 1000 was released .