Half-Life Dedicated Server--
is a program that you can use to create a Half-Life game server to the public.
It also supports Half-Life mods such as Counter-Strike, Day of Defeat, The Specialists, Natural Selection, Global Warfare, and Underworld.
"I'm going to go download HLDS and run my own counter-Strike Server!"
"To run a Half-life server, you need HLDS."
"If It wasn't for HLDS, I wouldn't be on this server getting pwned by nubs!"