SPDY (pronounced "speedy")[1] is an obsolete open-specification communication protocol developed for transporting web content.[1] SPDY became the basis for HTTP/2 specification. However, HTTP/2 diverged from SPDY and eventually HTTP/2 subsumed all usecases of SPDY.[2] After HTTP/2 was ratified as a standard, major implementers, including Google, Mozilla, and Apple, deprecated SPDY in favor of HTTP