Oh's

Honey Graham Oh's (or Oh's! or Oh!s ) is a cereal brand introduced in the mid-1980s by the Quaker Oats Company. The pieces are crunchy corn and oat rings filled with graham cracker bits, crispy rice, and honey.

Oh's originally came in two varieties: "Crunchy Graham" and "Honey Nut". In 1988, the names of the two versions were renamed "Honey Graham" and "Crunchy Nut." Eventually, Crunchy Nut discontinued; today, only Honey Graham is available. In 1989, Quaker went on to introduce a variety of flavors, among them including "Apple Cinnamon Oh's", "Apple Oh's", and "Fruitangy Oh's". In late 2014, the brand was sold to Post Cereals.

...
Wikipedia