Computer systems administrators need knowledge in the following areas:

• Computers and Electronics: Computer hardware and software.
• English Language: The meaning and use of the English language.
• Customer and Personal Service: Providing special services to customers based on their needs.
• Engineering and Technology: How to use computers and rules of engineering to design and produce goods and services.
• Telecommunications: The tools used to send messages and data.
• Mathematics: The rules and uses of numbers.
• Clerical: General office work such as filling and storing information.