Before the internet, the most common way to find businesses, products, and services was to search in the Yellow Pages (Yellow Book) – a telephone directory with the entire listing of businesses or vendors, organized by category. In the early ’90s, at the very beginning of the internet era, Yellow Pages concept moved online where listing websites like Yahoo listings or Craigslist offered search and categorization where in addition to viewing just listings of these businesses you could search for a business and find the one you’d like to engage with.