TENEX may refer to: TENEX (operating system) Techsnabexport, a Russian company specializing in export of nuclear materials Tenex, a brand name for the medication guanfacine, a sympatholytic used to treat hypertension, ADHD and Anxiety Tenex, a brand name for .22 LR ammunition manufactured by Eley Limited and widely used in high level competition such as the ISSF World Cup and Olympic Games 10X, an alternative name for superfine powdered sugar or confectioner's sugar 10x, internet slang for "thanks"; see wikt:10x See also TENEX C shell