What is power button symbol? History behind it's logo design

What is Power Symbol? History behind it's logo design

Power button is a button which activates or deactivates the particular device, when operated. Originally, Power control switches had a lever or slides that were toggled between two positions ON and OFF manually.But due to increasing demand of electrical and electronic appliances later this two English words were replaced by binary numerical ‘1’ and ‘0’ to bypass the language barrier. Graphically this numerical are represented by line (I) and a circle (O).



With time technology became more advanced in interface design which resulted in on/off power button.Single button is used to ON & OFF the particular device and the symbol of power button was created by superimposing graphical symbols of ON and OFF buttons ( Line (I) and a Circle (O) ).



According to International Electrotechnical Commisiion (IEC) standards

IEC 60417-5007 – Graphical symbol of Power ON is line
IEC 60417-5008 – Graphical symbol of power OFF is circle
IEC 60417-5009 – Graphical symbol of POWER is line partially within a circle

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