LiteSpeed is a high-scalability web server.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
SPIP is a content management system written in PHP that uses one or more databases like SQL, SQLite or PostgreSQL.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.