Although I can memorize some phone numbers and mobiles phone numbers, I still keep a Phone Book handy. It makes me more organized. Here in the Philippines, when I want to know the phone number of a certain company, there is a three-digit number that I’ll call and the operator will give the number I requested. But I’ve learned that in the US you can get not only the number of what you’re looking for (person, agency or service company, and establishments) but their complete information as well. The USA Phone book database is complete with everything you want to know. How was that? You can even have a background check of a certain company. That way, you’ll be assured that you’ll dealing with legal ones.