Programming = Data Structures + Algorithms
Data: It is a symbol that describes objective things, an object that can be manipulated in a computer, and a collection of symbols that can be recognized by the computer and input to the computer for processing. (Humanity)
Data element: It is the basic unit that makes up the data and has a certain meaning. It is usually processed as a whole in the computer, and it is also called a record. (people)
Data items: A data element can consist of several data items. (Hospital system: eye, ear, mouth, nose...; business system: name, gender, job number, ID number....)
Data Object: A collection of data elements of the same nature, a subset of data. (Everyone has name, gender, birthday)
Data structure: A collection of data elements that have one or more specific relationships with each other. (relative, friend, lover)