An instructional look or program that takes the user through a prescribed sequence of steps in order to learn a product.Contrast with documentation, which, although instructional in nature, tends to group features and functions according to category.

• 为学习产品提供的一种教学用书或程序，用户按指定次序可以一步一步学下去。同技术资料相比，它虽然本质上也是指导性的，但却是按类别说明其特点和功能的。