A hierarchy can be constituted-of-or-filled-with mechanisms.Logical formLearned from2 sentences. A hierarchy can be constituted-of-or-filled-with benefits.Logical formLearned from2 sentences. A hierarchy can be constituted-of-or-filled-with (abstraction levels).Logical formLearned from2 sentences. A (pattern hierarchy) may make sense.Logical formLearned from2 sentences. A hierarchy may be shown in figure.Logical formLearned from2 sentences. A placement can be in a hierarchy.Logical formLearned from2 sentences. An abstraction may lie in a (definition hierarchy).Logical formLearned from2 sentences. A level can be in a hierarchy of digital systems.Logical formLearned from2 sentences. A hierarchy can be in a program.Logical formLearned from2 sentences. Hierarchies of a (source thesaurus) may be retained.Logical formLearned from2 sentences. A hierarchy may undergo a breakdown.Logical formLearned from2 sentences. Some terms may be arranged in hierarchies.Logical formLearned from2 sentences. A hierarchy may be expanded.Logical formLearned from2 sentences. Communication can be among hierarchies.Logical formLearned from2 sentences. (Memory hierarchies) may operate.Logical formLearned from2 sentences.