A hiatal hernia occurs when the upper part of your stomach pushes up through your diaphragm and into your chest region. The diaphragm is a large muscle that lies between your abdomen and chest. You use this muscle to help you breathe. Normally, your stomach is below the diaphragm, but in people with a hiatal hernia, a portion of the stomach pushes up through the muscle. The opening it moves through is called a hiatus. This condition mostly occurs in people who are over 50 years old.
A commodity generally refers to an agricultural product that is bought and sold such as corn, coffee, wheat, etc. Energy commodities include gas, electricity, oil, etc.
By definition, a commodity product lacks a unique selling point. In an IT context, the term usually differentiates typical consumer products from specialized or high-performance products. A commodity, in this context, is a low-end but functional product without distinctive features. A commodity computer, for example, is a standard-issue PC that is widely available for purchase. As technologies and markets for a given product mature, it is more likely to be considered a commodity, at least in its more basic implementations.