Multiple Listing Service (MLS) (also Multiple Listing System or Multiple Listings Service) is a database which allows real estate brokers representing sellers under a listing contract to widely share information about properties with real estate brokers who may represent potential buyers or wish to cooperate with a seller's broker in finding a buyer for the property. The MLS combines the listings of all available properties that are represented by brokers who are both members of that MLS system and of NAR or CREA, (the National Association of Realtors in the US or the Canadian Real Estate Association).

ARMLS stands for Arizona Regional Multiple Listing Service. ARMLS was incorporated in 1982 - one of the first regional multiple listing companies in the US - its goal being to consolidate the many autonomous boards across the valley into a single system able to provide its members with comprehensive multiple listing and other vital agent services at a reduced cost.

The Council of Better Business Bureaus is the umbrella organization for the Better Business Bureau (BBB) system, which was founded in 1912 and is today supported by more than 300,000 local business members nationwide. It is dedicated to fostering fair and honest relationships between businesses and consumers, instilling consumer confidence and contributing to an ethical business environment.

The Office of Fair Housing and Equal Opportunity administers federal laws and establishes national policies that make sure all Americans have equal access to the housing of their choice.

Leading Real Estate Companies of the World is comprised of the best-known local and regional independent real estate names in the business, with annual sales of over $400 billion, more than any other residential real estate organization.

LuxuryRealEstate.com is a global network of over 850 luxury real estate brokerages and provides a reference for luxury real estate agents worldwide in a hardbound, annually published directory. Each member is carefully selected by John Brian Losh based on the company's established reputation for performance, experience with high-end properties, and quality service.