International contest
Physics Bulletin · 1968
An international prize contest, offering prizes of Dfls 25 000,15 000 and 5000, to mark the 50th anniversary of the Netherlands Postal Cheque and Clearing Service (Giro), has been organized by the Netherlands Postal and Telecommunication Services (PTT). The Giro Service was founded in 1918 and was automated in 1958 when a punch card system was introduced.