Simplify the following text for a Grade 7 native English-speaking person.
Original: In September 2003 Apple Computer was again sued by Apple Corps , this time for introducing the iTunes Music Store and the iPod , which Apple Corps asserted was a violation of Apple 's agreement not to distribute music .
Simplified: They made a deal that Apple Computers would not act as a music company . When Apple Computers began to sell their iPod , and set up iTunes , Apple Corps believed they had broken their agreement , and took them to court .