Methods and uses of online processing, including the steps involved in carrying out: electronic funds transfer, automatic stock control, electronic data interchange (exchange), business-to-business buying and selling, online shopping

System processing and flow of data through a system, including: Data flow diagrams (DFD), level 0 (context-level), level 1 and level 2 diagrams, construct a system flowchart and a data flow diagram (DFD) using correct symbols (see symbols at the end of the ‘Subject content’ section)