Simplify the following text for a Grade 11 native English-speaking person.
Original: The OHA was established on 5 November 2007 , led by Google with 34 members including mobile handset makers , application developers , some mobile carriers and chip makers .
Simplified: The OHA was started on 5 November 2007 by Google and 34 other companies . The companies included mobile phone manufacturers , application developers , mobile network operators and processor makers .