In the "Computer Stamps Catalog" by Dan N. DOBRESCU, the evolution of computing technology is explored through stamps from various countries. The catalog covers a wide range of topics, from the history of computing devices like the abacus to modern innovations in artificial intelligence and augmented reality.
The abacus, invented in China around 2600 B.C., is considered a precursor to modern computers. It was a simple calculating tool that aided in counting and arithmetic operations. The catalog showcases stamps related to the abacus, highlighting its significance in the history of computing.
An analogue computer utilizes continuously-changeable physical phenomena to solve problems, in contrast to digital computers that represent values incrementally. The catalog features stamps from different countries depicting analogue computers, showcasing their role in early computational technology.