The term 'Modern Beginning' can be summarized by the crossword solution NEO, which is a three letter word. NEO is a Greek prefix meaning 'NEW' or 'RECENT'. It is often used to describe something that is modern or up-to-date. NEO is commonly used in technology, such as in the term 'neo-tech', which refers to the use of modern technology to improve existing products and services. NEO is also used in the medical field, such as in the term 'neo-natal', which refers to the care of newborn babies. In general, NEO is a useful term to describe something that is modern or up-to-date.