How do I install the downloaded Comic Neue Angular Bold font on different operating systems?

To install Comic Neue Angular Bold, first extract the font files (usually .ttf or .otf) if they are in a compressed archive. On Windows, right-click the font file(s) and select 'Install' or drag them into the 'Fonts' folder in the Control Panel. On macOS, double-click the font file(s) and click 'Install Font' in the Font Book application. For Linux (e.g., Ubuntu), place the files in ~/.fonts (create if it doesn't exist) or /usr/local/share/fonts, then run 'fc-cache -fv' in the terminal to update the font cache. After installation, restart any applications that need to use the new font to ensure it appears in their font lists.