"`" ASCII code 96.Common names: left quoteleft single quoteopen quoteITU-T: grave accentgrave. Rare: backprimeINTERCAL: backsparkunapostrophebirkblugleback tickback glitchpushITU-T: opening single quotation markquasiquote.Back quote is used in Unix shells to invoke {command substitution}.(1996-11-26)