(CNN) — When we hear that an industry is celebrating its 100th anniversary, images of the industrial revolution might spring to mind, with its coal-powered steam machines, railways and chimneys.
But this will soon apply to a sector generally associated with cutting-edge technology and the modern world.
October 2019 marked the 100-year anniversary of Queen Wilhelmina of the Netherlands granting the "royal" title to a small, pioneering airline that was due to be founded.
The Koninklijke Luchtvaart Maatschappij, more commonly known by its initials KLM, grew to become one of the largest airlines in Europe, as well as one of the most iconic brands in the aviation industry.
A crown features prominently in its livery, but perhaps the crown this airline carries with the most pride is that of being the oldest airline in the world today.
Surprisingly for an industry known for its volatility and financial instability, quite a few airlines from those heroic early years of aviation are still surviving in their original form.
Here are 10 of the oldest airlines in the world still in operation.
KLM Royal Dutch Airlines turned 100 years old in October 2019. CNN Business Traveller celebrates with a visit to KLM's archives
Year of foundation: 1919
First flight: May 1920