We've played in Team Fortress 2 Beta (2009)

And we know what is P.D.Q., what is G.R.U. and what is Fire Retardant Suit because we've tested them ourselves.
This group is NOT related to the current beta. It's related to beta from 2009, and the current beta was released in 2010.
(Группа для тех, кто тестировал закрытую бета версию игры Team Fortress 2 в 2009 году)

P.D.Q. (Similar weapon is Gunslinger)[tf2wiki.net]
Fire Retardant Suit (Similar weapon is Spy-cicle)[tf2wiki.net]
G.R.U. (Added to the game)[tf2wiki.net]