Reply To: Chemistry mixture of letters and abbreviation UEB/NEM/CHEM Home › Forums › Nemeth Code for Math and Science › Chemistry mixture of letters and abbreviation UEB/NEM/CHEM › Reply To: Chemistry mixture of letters and abbreviation UEB/NEM/CHEM October 16, 2018 at 1:10 pm #32124 kdejuteModerator Also, it is worth noting that none of the letters we're discussing here is an abbreviation; they are all variables or chemical SYMBOLS.