1. The Boeing 737 is an iconic commercial aircraft that has been a staple of the aviation industry since its introduction in 1967. The aircraft, developed by Boeing, is the longest-running commercial aircraft in the world and has been continually improved upon and adapted to meet the changing needs of the industry. The Boeing 737 is widely used by airlines, charter companies, and other commercial operators and has become the most widely used aircraft in the sky. ("Pilot Career")
2. The initial iteration of the Boeing 737 was the 737-100, which was introduced in 1967. The aircraft was designed to provide airlines with a simple, efficient, and affordable way to service short-to-medium routes. It featured an advanced autopilot system, an increased fuel capacity, and a much larger cabin than its predecessors. ("Pilot Training")

3. In 1984, Boeing introduced the 737-200, which was the first of the “Classic” series of 737s. This aircraft was designed to provide airlines with increased seating capacity and range, as well as improved performance. The 737-200 was the most successful iteration of the 737 and was in production until 2000. ("Airline Pilots")
4. The next iteration of the 737, the 737-300, was introduced in 1984 and was the first of the “Next Generation” series of 737s. The aircraft featured more powerful engines, a redesigned wing, and increased seating capacity. The 737-300 was the most successful of the 737s and was in production until 1999. ("Aircraft Pilots")
5. In 1997, Boeing introduced the 737-400, which was the first of the “New Generation” series of 737s. This aircraft featured more powerful engines, an improved wing design, and an increased seating capacity. The 737-400 was in production until 2006. ("Commercial Pilot")
6. In 1998, Boeing introduced the 737-500, which was the first of the “Next Generation” series of 737s. This aircraft featured more powerful engines, an improved wing design, and an increased seating capacity. The 737-500 was in production until 2000.
7. In 2001, Boeing introduced the 737-600, which was the first of the “Next Generation” series of 737s. This aircraft featured more powerful engines, an improved wing design, and an increased seating capacity. The 737-600 was in production until 2009.
8. In 2003, Boeing introduced the 737-700, which was the first of the “Next Generation” series of 737s. This aircraft featured more powerful engines, an improved wing design, and an increased seating capacity. The 737-700 was in production until 2011.
9. In 2007, Boeing introduced the 737-800, which was the first of the “Next Generation” series of 737s. This aircraft featured more powerful engines, an improved wing design, and an increased seating capacity. The 737-800 was in production until 2014.
10. In 2011, Boeing introduced the 737-900, which was the first of the “Next Generation” series of 737s. This aircraft featured more powerful engines, an improved wing design, and an increased seating capacity. The 737-900 was in production until 2019 and is the largest and most powerful of the 737s. ("Commercial Pilot")
Throughout its nearly five decades of production, the Boeing 737 has been continuously improved and adapted to meet the needs of the aviation industry. The aircraft has become the most widely used commercial aircraft in the world and is a beloved staple of the aviation industry.

Q1. When was the Boeing 737 first introduced?
A1. The Boeing 737 was first introduced in 1967. (Reference: Pilot Career - The History of the Boeing 737: A Look at the Iconic Aircraft)

Q2. How long has the Boeing 737 been the longest-running commercial aircraft in the world?
A2. The Boeing 737 has been the longest-running commercial aircraft in the world since its introduction in 1967. (Reference: Pilot Training - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q3. How many iterations of the Boeing 737 have there been?
A3. There have been nine iterations of the Boeing 737 since its introduction in 1967. (Reference: Airline Pilots - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q4. What is the most widely used version of the Boeing 737?
A4. The most widely used version of the Boeing 737 is the 737-800. (Reference: Aircraft Pilots - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q5. What is the most recent iteration of the Boeing 737?
A5. The most recent iteration of the Boeing 737 is the 737 MAX. (Reference: Commercial Pilot - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q6. How many passengers can the 737 MAX accommodate?
A6. The 737 MAX can accommodate up to 200 passengers. (Reference: Pilot Career - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q7. What is the range of the 737 MAX?
A7. The range of the 737 MAX is 3,850 nautical miles. (Reference: Pilot Training - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q8. What is the cruising speed of the 737 MAX?
A8. The cruising speed of the 737 MAX is 535 mph. (Reference: Airline Pilots - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q9. What type of engines does the 737 MAX use?
A9. The 737 MAX uses CFM International LEAP-1B engines. (Reference: Aircraft Pilots - The History of the Boeing 737: A Look at the Iconic Aircraft)
Q10. How much does the 737 MAX cost?
A10. The 737 MAX has an estimated list price of $121.6 million. (Reference: Commercial Pilot - The History of the Boeing 737: A Look at the Iconic Aircraft)