ATL 

Hartsfield–Jackson Atlanta International Airport (IATA: ATL, ICAO: KATL, FAA LID: ATL), known locally as Atlanta Airport, Hartsfield, or Hartsfield–Jackson, is located seven miles (11 km) south of the central business district of Atlanta, Georgia, United States. It has been the world's busiest airport by passenger traffic since 1998, and by number of landings and take-offs from 2005 until 2013. Hartsfield–Jackson held its ranking as the world's busiest airport in 2012, both in passengers and number of flights, by accommodating 95 million passengers (more than 260,000 passengers daily) and 950,119 flights. Many of the nearly one million flights are domestic flights from within the United States, where Atlanta serves as a major hub for travel throughout the Southeastern United States. The airport has 207 domestic and international gates.

Hartsfield–Jackson is a focus city for low-cost carrier Southwest Airlines and is the primary hub of Delta Air Lines, Delta Connection, Delta Shuttle, and Delta Air Lines partner, ExpressJet. With nearly 1,000 flights a day, the Delta Air Lines hub is the world's largest airline hub. Delta Air Lines flew 59.01% of passengers from the airport in February 2011, AirTran flew 17.76%, and ExpressJet flew 13.86%. In addition to hosting Delta Air Lines corporate headquarters, Hartsfield–Jackson is also the home of Delta's Technical Operations Center, which is the airline's primary maintenance, repair and overhaul arm. The airport has international service to North America, South America, Central America, Europe, Asia and Africa. As an international gateway to the United States, Hartsfield–Jackson ranks sixth.

The airport is located mostly in unincorporated areas in Fulton and Clayton counties. However, the airport spills into the city limits of Atlanta, College Park and Hapeville. The airport's domestic terminal is served by MARTA's Red/Gold rail line.

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-- What are small capitals? How are they different than something set in ALL CAPS?

small capitals (usually abbreviated small caps) are uppercase (capital) characters set at the same height and weight as surrounding lowercase (small) letters or text figures. All Caps would not have the same height and weight.

-- Does your font have small caps? If not name a font that does.

Yes, ITC New Baskerville does. 

-- Ligatures? why are they used? when are they not used? what are common ligatures?

Two or more letters are joined together to form one glyph or character. 

They are used to represent specific sounds or words. They are not used in place of letters. Common ones:ff, fl, fi

-- Does your font have ligatures? If not name a font that does. 

Adobe Garamond has a lot of ligatures

-- Difference between a foot mark and an apostrophe?

Foot marks are usually straight and don't have curves and is used to mark time or feet. An apostrophe is used in punctuation to emphasize a phrase or word or to indicate a conversation. 

-- Difference between an inch mark and a quote mark (smart quote)?

An inch mark (double prime) is also used to mark time or inches. A quote mark is used to quote what people are saying. 

-- Hyphen, en dash and em dashes, what are the differences and when are they used.

The hyphen connects two things that are intimately related, usually words that function together as a single concept. The en dash connects things that are related to each other by distance of any range. The em allows an additional thought to be added within a sentence like (). Em dashes also substitute for something missing or can be used like bullet points.