of tower directory software are: TowerBase History The earliest known change ringing programs can be traced back to the 1950s. Some of this history is traced in this article on software firsts. See also Braid theory Campanology References External links Bell Conductor software to help to achieve harmony and melody through visualization of a ringing sequence from text and midi files "Abel" simulator software Excalibur composition proving software Beltower bell ringing simulator, prover, composer, method/touch editors and printing software Virtual Belfry simulator software, high-resolution photographic animation of change ringing bells Visual Method Archive (VMA) – simple, FREE, web-based tool to view blue lines for methods and experiment with generating your own Elf – online lead and half-lead spliced composing engine Stedman Pricker – assists the Stedman composer in pricking and proving compositions on all numbers Smart Phone Apps for Ringers – directory of free and paid for smart phone apps for bell ringing Campanology Electronic musical instruments English culture