Menu ordering (2)
1 level menu, 4 columns of 16 items each
five menu structure organisations:[CC] category-category
[J.E. McDonald, J.D. Stone & L.S. Liebelt (1983) Searching for items in menus: the effects of organization and type of traget. Proceedings of the Human Factors Society 27th Annual Meeting, 2, pp. 834-837]