Editing Baudot code (section)

===Western Union===
[[File:Baudotkeyboard.png|right|frame|Keyboard of a [[teleprinter]] using the Baudot code (US variant), with FIGS and LTRS shift keys]]
Murray's code was adopted by [[Western Union]] which used it until the 1950s, with a few changes that consisted of omitting some characters and adding more control codes. An explicit SPC (space) character was introduced, in place of the BLANK/NULL, and a new [[Bell character|BEL]] code rang a bell or otherwise produced an audible signal at the receiver. Additionally, the WRU or "Who aRe yoU?" code was introduced, which caused a receiving machine to send an identification stream back to the sender.
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