The term 'Apple Pie PRO' is a combination of three words: MOM (3 letters), BAKER (5 letters), and PRO (3 letters). The first word, MOM, is an abbreviation for mother, which is a term used to refer to a female parent. The second word, BAKER, is a noun that refers to someone who bakes food, such as bread, cakes, and pies. The third word, PRO, is an abbreviation for professional, which is a term used to describe someone who is highly skilled in their field. Together, these three words form the job description of an Apple Pie PRO, which is someone who is a professional BAKER of apple pies.