(Computer science concepts) can be abstract.Logical formLearned from5 sentences. A (performance model) can be abstract.Logical formLearned from5 sentences. An abstract (data type) may be implemented in a (library module lexing).Logical formLearned from5 sentences. (Thought processes) can be abstract.Logical formLearned from5 sentences. A (class format) can be an abstract class.Logical formLearned from5 sentences. (Thinking abilities) can be abstract.Logical formLearned from5 sentences. A class may represent an abstract class.Logical formLearned from5 sentences. A mathematician can be abstract.Logical formLearned from5 sentences. Anger can be abstract.Logical formLearned from5 sentences. An abstract class can be for information.Logical formLearned from5 sentences. Constraints can be abstract.Logical formLearned from5 sentences. A font can be abstract.Logical formLearned from5 sentences. A path can be abstract.Logical formLearned from5 sentences. Sympathy can be abstract.Logical formLearned from5 sentences. Identities can be abstract.Logical formLearned from5 sentences.