Sign on a Shop

I read a sign in Gujarati on a shop, which said "J Rocks"

I spent the next half hour trying to figure what or who J was






And then I asked the shopkeeper , it was "Xerox" πŸ˜‡πŸ˜£πŸ˜«πŸ˜£πŸ˜«πŸ˜‚πŸ˜‚πŸ˜‚