Okay! I couldn't resist this find!  It is worth following the link just to check out their domain name.

THE WORLD'S LONGEST ABBREVIATION
THE LONGEST LIST OF THE LONGEST STUFF AT THE LONGEST DOMAIN NAME AT LONG LAST

The first question is 'why is abbreviation such a long word?'

This abbreviation may just explain it, it is the world's longest abbreviation

NIIOMTPLABOPARMBETZHELBETRABSBOMONIMONKONOTDTEKHSTROMONT

Meaning: Laboratory for Shuttering, Reinforcement, Concrete and Ferroconcrete Operations for Composite-monolithic and Monolithic Constructions of the Department of Technology of Building Assembly Operations of the Scientific Research Institute of the Organization for Building Mechanization and Technical Aid of the Academy of Building and Architecture of the USSR.