Acrobat uses the fonts in your system, so you add it to Acrobat by adding it to your system. The "BT" means it's made by a major font company Bitstream. You can buy it here. Note that faces are separate purchases, so you need to know which faces to buy (e.g. Light, MediumBold, Heavy...) unless you buy all 20 faces (which is hundreds of dollars worth).