Stamp Issue "Science and Technology – Digital Electronics"
24/11/2020 15:14

Macao Post and Telecommunications Bureau will issue the stamp theme “Science and Technology – Digital Electronics” on 30th November, 2020, and this is the eighth “Science and Technology” stamp series. Digital Electronics, in its Physical and Mathematical components, forms the basis of the creation of immeasurable Electronic Devices that are currently part of our lives, such as: the Internet, Computers, Tablets, Mobile Phones, Robots, etc. However, in the Mathematical component, it is Boolean Algebra which constitutes its Fundamental Theoretical Tool and that will allow its development.


This issue includes a set of six stamps and one souvenir sheet. The images in the stamps, for two Input Variables, the Truth Tables, the Boolean Expressions, the Logical Symbols, the Basic Electronic Circuits and the Venn Diagrams are presented, for the NOT, AND and OR Gates. Presented in the Souvenir Sheet are: two Electronic Circuits (I and II) called Half-Adder which allow the Addition of Two Bits, being S its Sum and Ts the Carry Out; the Truth Table of the Operation; the Logical Expression of the Sum and also an image of George Boole, who had an important contributions to the development of Boolean Algebra.


The above issue will be available for sale at the General Post Office (9:00a.m. to 5:30p.m.), the Communications Museum (9:00a.m. to 1:00p.m., 2:30p.m. to 5:30p.m.), and the “Rua do Campo” Post Office (9:00a.m. to 7:00p.m.). The mail service for the relative philatelic products cancelled with the commemorative postmark will be available on the issue date at the above locations. The philatelic products are as follows:


Philatelic Products

Selling Price


Set of 6 Stamps

19.50 patacas



19.50 patacas


Souvenir Sheet

14.00 patacas


First Day Cover with Stamps

25.50 patacas


First Day Cover with Souvenir Sheet

20.00 patacas


Information Brochure

7.00 patacas


Information Brochure with Stamps

26.50 patacas


Information Brochure with Souvenir Sheet

21.00 patacas



The concept of this issue and the author of text are responsible by Eng. Carlos Alberto Roldão Lopes, and the stamp designer of this issue is Mr. Carlos Gonçalves.


This is the fourteenth theme of 2020 issues. The previous issued stamps are “Lunar Year of the Rat” on 05/01/2020, “70th Anniversary of the Macao Federation of Trade Unions” on 20/01/2020, “Gastronomy and Sweets III – Traditional Popular Snacks” on 01/03/2020, “Regional Medicinal Plants II” on 20/04/2020, “70th Anniversary of the Women’s General Association of Macau” on 21/05/2020, “Centenary of the Macau Red Cross” on 12/06/2020, “Fight Against the Epidemic Together” on 24/06/2020, “Chinese Medicine” on 03/07/2020, the label stamp “Lunar Year of the Rat” on 04/08/2020, “Literature and its Characters – Luo Shen Fu” on 10/08/2020, “Centenary of the Chinese Educators’ Association of Macau” on 10/09/2020, “Chinese Classical Poetry – Poems of Tang Dynasty” on 28/09/2020, “Animal Protection II” on 09/10/2020, and “Jin Yong’s Novels” on 30/10/2020.


Technical Data of Stamp “Science and Technology – Digital Electronics”


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