KCNScrew (AKA: KCNcrew Pack) is a very useful software serial number querying tool for Mac OS. With Serial Box, they are known as the two Serial Numbers/Cracks/Patches obtaining edge tools with the highest praise rate on Mac. Both functions and designs are very similar, both have the most complete and largest set of serial numbers, both have a long time of development and maintenance, both update their database almost in the middle of every month (on the 15th), and both have been updated for years.

MahJong is a game, entertainment equipment invented by Chinese during the Qing dynasty. It consists of small rectangular blocks made of bamboo, bone or plastic, each of which is engraved with a pattern or inscription. Each pair of MahJong in North China has 136 cards, while that in South China (called sparrow/麻雀 in Guangdong, Hong Kong, Macao and Southern Fujian) has eight more cards, namely: Spring, Summer, Autumn, and Winter; Plum, Orchid, Bamboo, and Chrysanthemum, 144 cards in total. In April 2017, the International Mind Sports Association (IMSA) announced that MahJong had officially become one of the world intellectual sports program.

Grand Theft Auto is a famous crime-themed game series developed by Rockstar Games. Its first work was released in 1997. The game mixes elements of driving, shooting, fighting, nurturing and even business in a gangster background setting. This game quickly became popular after the release of Grand Theft Auto: Vice City, in which most players first learned about Grand Theft Auto.

Microsoft Visual Studio (VS for short) consists of a series of development kit products produced by Microsoft (written in C++ and C#), and is currently the most popular IDE (integrated development environment) for developing applications on Windows platform. As of writing this post, its latest release is Visual Studio 2019, based on Microsoft .NET Framework 4.7.

Age of Empires, an epic and quite successful RTS (real-time strategy) game series, was developed by Ensemble Studios. The company was founded in 1995, and two years later they produced their first game work - Age of Empires. In 2001, it was acquired by Microsoft and became a game development company affiliated with Microsoft. Since then, it has rolled out many sequels and expansion packs of Age of Empires, which were released by Microsoft Game Studios (now called Xbox Game Studios).