Depuis au moins 10 ans, les imprimantes couleurs impriment en filigrane des points jaunes. Ils sont quasiment invisible à l’oeil nu mais on peut les apercevoir en scannant la page en 600dpi et en zoomant (image d’environ 1cm)

Package managers like Composer for PHP and NPM for Node have become essential tools for simplifying a developer’s life. A package manager is a tool for keeping track of what you’ve installed, as well as installing and upgrading packages. They also check for dependencies and compatibility. Bower is a package manager for the web.