Entry of information or commands should not require the user to remember special codes or sequences or to perform translations or conversions.
Additional Information:
Command names should specifically describe the functions being implemented and should reflect the vocabulary and syntax of user's operational language. The user should not have to transform units at time of data entry. For example, user entries should be in the same units that are used in control room displays and procedures; the user should not be required to convert from gallons per minute to gallons per hour.