The categories listed across the menu bar should be organized systematically.
Additional Information:
Conventions should be established for the organization of the menu bar. For example, the categories on the left side of the menu bar might be system functions that apply across all (or most) applications. The categories on the right side of the menu bar might be those that are specific to the currently active application. Within this general spatial layout, both the system-wide and specific categories would be ordered from left (the category containing the most frequently used actions) to right (the category containing the least frequently used).