In heraldry, azure is the tincture with the colour blue, and belongs to the class of tinctures called "colours". In engraving, it is sometimes depicted as a region of horizontal lines or else marked with either az. or b. as an abbreviation.
Amazon Elastic Compute Cloud (also known as "EC2") allows users to rent computers on which to run their own computer applications. EC2 allows scalable deployment of applications by providing a web service through which a user can boot an Amazon Machine Image to create a virtual machine instance containing any software desired.