Symptoms of celiac disease can vary from mild to severe. Some people have no symptoms, although they still are developing intestinal damage. Celiac disease is sometimes misdiagnosed as irritable bowel syndrome, Crohn's Disease, or gastric ulcers. Digestive symptoms may include: 1  Abdominal bloating and pain. 2  Diarrhea. 3  Vomiting. 4  Constipation. 5  Pale, foul-smelling stool.
For other uses, see IOS (disambiguation). iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that presently powers many of the company's mobile devices, including the iPhone, iPad, and iPod Touch.
iOS comes with a lot of default apps, including an email client, a Safari Web browser, a portable media player (iPod) and the phone app. Developers can use the iOS software development kit (SDK) to create applications for Apple mobile devices. The SDK includes tools and interfaces for developing, installing, running and testing apps. Native apps can be written using the iOS system frameworks and the Objective-C programming language.