Eiffel Tower In 1909, a permanent underground radio centre was built near the south pillar, which still exists today. On 20 November 1913, the Paris Observatory, using the Eiffel Tower as an aerial, exchanged wireless signals with the United States Naval Observatory, which used an aerial in Arlington, Virginia. The object of the transmissions was to measure the difference in longitude between Paris and Washington, D.C. Today, radio and digital television signals are transmitted from the Eiffel Tower. A television antenna was first installed on the tower in 1957, increasing its height by 18.7 m (61.4 ft). Work carried out in 2000
Visual Eiffel Visual Eiffel Visual Eiffel is an implementation of the Eiffel programming language developed and distributed by Object Tools GmbH, a German company. Visual Eiffel provides an integrated development environment running on Microsoft Windows. A major design goal is to provide an environment that, unlike EiffelStudio, does not use an original user interface paradigm but instead is comfortable to programmers familiar with such tools as Microsoft's Visual Studio and Borland's Delphi. Visual Eiffel includes a "Display Machine" for developing GUI applications. While many other Eiffel compilers generate C, Java bytecode or bytecode for .NET, the Visual Eiffel compiler generates native X86