ASCII code _ , underscore , understrike , underbar or low line, American Standard Code for Information Interchange, The complete ASCII table, characters,letters, vowels with accents, consonants, signs, symbols, numbers underscore, understrike,
How to underscore on a Mac keyboard - Quora
Anyone have any idea what these symbols of triangle and dash denote below the letter and is there any shortcut to get into performance, quiet or cool mode without going into AWCC :