(March 2013) Visual Basic for Applications (VBA) is an implementation of Microsoft's event-driven programming language Visual Basic 6, which was discontinued in 2008, and its associated integrated development environment (IDE).
Decision Support System (DSS) A decision support system (DSS) is a computer-based application that collects, organizes and analyzes business data to facilitate quality business decision-making for management, operations and planning.
Mission-critical support means that crucial processes require a specialized group such as production control to implement and maintain them. Basically, the 24 x7 group is paid not to sleep. Their life should revolve around the infrastructure. When a server goes down, the on-call support staff jumps.