Robert Martin McCool (born 1973), more commonly known as Rob McCool, is a software developer and architect.McCool was the author of the original NCSA HTTPd web server, later known as the Apache HTTP Server, and until Apache version 2.2, httpd.conf files as distributed contain comments signed with his name. He wrote the first version while he was an undergraduate at the University of Illinois at Urbana–Champaign, where he was working with the original NCSA Mosaic team.