Command
Language
Users can syntax to express
complex possibilities rapidly
Macros, Excel functions,
Programming
Advantages
Flexible
Appeals to power users
Supports strong locus of control
and user initiative
Simplifies data entry
Convenient creation of
user-defined macros
Disadvantages
High error rate
Poor error handling because of
diversity of possibilities
Requires substantial training
and memorization
θ Good for Expert Frequent Users