The English/Spanish side of El Glosario lists alphabetically hundreds of terms used in the trucking industry, along with their Spanish equivalent. The Spanish/English side lists the Spanish-language terms and their English equivalent alphabetically. That way, readers can find the word or words that they want whether they're starting with Spanish and trying to find the English or the other way around. The book measures 4 inches by 6 inches, the same size as the Federal Motor Carriers Safety Regulations pocketbook, and is just as handy.