The term 'Horse and Buggy' refers to a type of transportation that was popular in the 19th century. It consists of a horse-drawn carriage, usually with two wheels, and is often associated with rural areas. The crossword solutions for this term are ERA (3 letters), OBSOLETE (8 letters), and RIG (3 letters). ERA refers to the time period in which the horse and buggy was most popular, while OBSOLETE indicates that the mode of transportation is no longer used. Finally, RIG is a term used to describe the horse-drawn carriage itself.