Arial_black_16.h is a specific header file used in microcontroller programming—most commonly with the Dot Matrix Display (DMD)
To use this font, you typically include the header file in your sketch and select it through the display object: arduino/DMD/Arial_black_16.h at master - GitHub arial black 16.h library
This file is most commonly associated with the Dot Matrix Display (DMD) or Adafruit GFX libraries. It allows developers to display text on monochrome OLEDs or LED matrix panels (like the P10 32x16 displays) in a specific bold, legible style. Technical Structure Arial_black_16