Provides concise coverage of Advanced Level Computer Science specifications. Organised in short 'bite-sized' chapters to facilitate rapid learning, this book is also suitable as a main text for students taking one year AS Level course.By using a data flow diagram you are able to see the source of the data, what processes need to be applied to the data, and what outputs to expect. ... Example Time sheets (showing hours worked) must be processed; so validated data is entered into the computer for the weekly payroll run. Show, by ... be detected before the data is entered into the system, and can be corrected by passing the form back to the employee. ... Dona#39;t forget to question each stage of the manual process.
|Title||:||Understanding Computer Science for Advanced Level|
|Publisher||:||Nelson Thornes - 2001|