Abstract: An electronic advertising system includes an advertising figure, and the electronic advertising system processes the advertising figure to form a first predetermined quantity of advertising blocks and repeatedly form a second predetermined quantity of advertising blocks from the first quantity of advertising blocks respectively, and the electronic advertising system provides the second predetermined quantity of advertising units, and each advertising unit has he first predetermined quantity of same advertising blocks, the first predetermined quantity of different advertising blocks, or the first predetermined quantity of partially same and partially different advertising blocks. Therefore the electronic advertising system can improve the advertising effect of the advertising figure by the plurality of advertising units.

Abstract: An electronic class system includes a class certifying unit for certifying a plurality of students of a class, a class information displaying unit for displaying a school name and a grade level of the class, a class student displaying unit for displaying a plurality of student images of the class, and the student images are linked to a student information group; and a class message announcing unit for displaying at least one message title. Therefore, the electronic class system can save expenses of students and allows the students to update their correspondence data and keep in contact with each other anytime.