The Serial.write() function behaves differently depending on what you pass into it compared to Serial.print() :

The process of returning WZ-507 to airworthy condition (association with the Vampire Preservation Group ,).

In the world of MapleStory "private servers" (customized versions of the game run by enthusiasts), serial.wz is frequently a point of interest. Developers of these servers often need to modify or read this file to ensure compatibility between their server-side data and the user's game client.

In CI or edge devices, you can chain serial.wz with other Unix tools: