Characteristics of operating systems including: Command Line Interface (CLI), Graphical User Interface (GUI), dialogue based and gesture based interface

Components of user documentation including: purpose of the system, limitations of the system, hardware and software requirements, how to load/ run/install software, how to save a file, how to print data, how to add records, how to delete/edit records, input format, output format, sample runs, error messages, error handling, troubleshooting guide/helpline, frequently asked questions, glossary of terms

The need to identify the inputs, outputs and processing of the current system, problems with the current system, the user and information requirements for the new system