CALS (Continuous Acquisition and Life-cycle Support, formerly known as Computer-aided Acquisition and Logistic Support.) is based on protocols from the United States Department of Defense for electronically acquiring documentation and connecting associated information.

These protocols have developed a number of standard specifications for the exchange of electronic data with commercial suppliers. These standards are frequently referred to simply as "CALS".

Effectively adopting CALS procedures requires close coordination among buyers and suppliers, using standard methods (electronic data interchange or EDI), while streamlining business processes (business process engineering), and effective use of business and technical information.