Another game, for the occasion of NLO's 75th birthday in 1963, took a bit more time to complete. The contenders had to fill in a ‘horizontale doorloper’, a horizontal crossword puzzle made in the form of the letters 'NOB', which was, until a few years ago, the acronym used for Nederlandsch Octrooibureau.
The acronym, however, was also used by the ‘Nederlandse Onderwatersport Bond’ (Dutch Underwater Sports Federation), the ‘Nederlandse Orde van Belastingadviseurs’ (Dutch Order of Tax Advisers), the ‘Nationaal Orkest van België’ (National Orchestra of Belgium), the ‘Nederlands Omroepproduktie Bedrijf’ (Dutch Broadcasting Company) and some more.
Fortunately, we do not have that problem with NLO! Although the ‘Nieuwe Lerarenopleiding’ (new teacher education program) also uses the abbreviation NLO. But thanks to various Russian IP firms we were informed that NLO, in Russian, stands for 'Neidentifikovani Leteći Objekat' or UFO in English: Unidentified flying object!