From Somalilandpress.com: To recap, one of the basic principles of Islamic banking is the prohibition of usury or interest. Up until the 1980s interest was generally interpreted to only apply to usury but it is now accepted practice to refer to all interest.
Other principles are based on simple morality and common sense, which are by no means unique to Islam. For example, usury was also prohibited by the Old as well as the New Testament. Even literary heavyweights such as Shakespeare weighed in against the practice……..Full Article: Source