| Subject | English | Spanish |
| chem. | H.T.U. | altura de una unidad de transferencia |
| gen. | she has an air conditioner with a high number of B.T.U.'s | tiene un aparato de aire acondicionado con muchas frigorías |
| food.ind. | U.H.T. | temperatura ultra elevada (Refers to sterilization of liquids at an ultra-high temperature. See also H.T.S.T) |